Backpack Loadout Category (#957)

# Description

#794 apparently
silently deprecated the Backpack Preferences button. Selecting a
backpack preference no longer actually does anything, and instead your
backpack comes from your Loadout. This would have been fine if we were
warned about this, but because nobody merged upstream for 2 weeks after
the release of PR794, this issue went unreported.

Well now the solution is going to require adding every backpack in the
entire game to a new Backpacks tab. I've started this PR, but because
it's really late and I have Calculus classes in the morning, I won't be
able to finish it tonight. So I'm enlisting the help of a few other
people I know to PR to this PR to help get the backpacks in.

After we have backpacks in the loadout tab, and after Wizmerge, I'll
probably do a separate PR to actually remove the now useless Backpack
selection button.

This is probably for the better long term. Since this technically means
Backpack slots are no longer hardcoded to "Backpack/Duffelbag/Satchel",
and now the back slot is freeeeee to be used for anything.

<details><summary><h1>Media</h1></summary>
<p>


![image](https://github.com/user-attachments/assets/7081660f-68f0-471e-99eb-67f026b7e122)

</p>
</details>

# Changelog

:cl:
- add: Backpacks, Duffelbags, and Satchels have been added to loadouts.
- remove: The button for "Backpack Preference" has been removed.
Backpacks selection is now done via Loadouts.
- remove: The button for "Suit/Skirt Preference" has also been removed.
Suit selection is done via Loadouts.

Content.Client/Preferences/UI/HumanoidProfileEditor.xaml

@@ -91,18 +91,6 @@
                                 <Control HorizontalExpand="True"/>
                                 <Button Name="ShowLoadouts" Pressed="True" ToggleMode="True" Text="{Loc 'Show'}" HorizontalAlignment="Right" />
                             </BoxContainer>
-                            <!-- Clothing -->
-                            <BoxContainer HorizontalExpand="True">
-                                <Label Text="{Loc 'humanoid-profile-editor-clothing-label'}" />
-                                <Control HorizontalExpand="True"/>
-                                <OptionButton Name="CClothingButton" HorizontalAlignment="Right" />
-                            </BoxContainer>
-                            <!-- Backpack -->
-                            <BoxContainer HorizontalExpand="True">
-                                <Label Text="{Loc 'humanoid-profile-editor-backpack-label'}" />
-                                <Control HorizontalExpand="True"/>
-                                <OptionButton Name="CBackpackButton" HorizontalAlignment="Right" />
-                            </BoxContainer>
                             <!-- Spawn Priority -->
                             <BoxContainer HorizontalExpand="True">
                                 <Label Text="{Loc 'humanoid-profile-editor-spawn-priority-label'}" />

Content.Client/Preferences/UI/HumanoidProfileEditor.xaml.cs

@@ -6,25 +6,21 @@
 using Content.Client.Lobby;
 using Content.Client.Message;
 using Content.Client.Players.PlayTimeTracking;
-using Content.Client.Roles;
 using Content.Client.UserInterface.Controls;
 using Content.Client.UserInterface.Systems.Guidebook;
 using Content.Shared.CCVar;
 using Content.Shared.Clothing.Components;
 using Content.Shared.Clothing.Loadouts.Prototypes;
-using Content.Shared.Clothing.Loadouts.Systems;
 using Content.Shared.Customization.Systems;
 using Content.Shared.GameTicking;
 using Content.Shared.Humanoid;
 using Content.Shared.Humanoid.Markings;
 using Content.Shared.Humanoid.Prototypes;
 using Content.Shared.Preferences;
 using Content.Shared.Roles;
-using Content.Shared.Roles.Jobs;
 using Content.Shared.Traits;
 using Robust.Client.AutoGenerated;
 using Robust.Client.Graphics;
-using Robust.Client.Player;
 using Robust.Client.UserInterface;
 using Robust.Client.UserInterface.Controls;
 using Robust.Client.UserInterface.XAML;
@@ -33,10 +29,8 @@
 using Robust.Shared.Enums;
 using Robust.Shared.Map;
 using Robust.Shared.Physics;
-using Robust.Shared.Player;
 using Robust.Shared.Prototypes;
 using Robust.Shared.Utility;
-using static Content.Client.Stylesheets.StyleBase;
 using Direction = Robust.Shared.Maths.Direction;
 
 namespace Content.Client.Preferences.UI
@@ -63,8 +57,6 @@ public sealed partial class HumanoidProfileEditor : BoxContainer
         private OptionButton _sexButton => CSexButton;
         private OptionButton _genderButton => CPronounsButton;
         private Slider _skinColor => CSkin;
-        private OptionButton _clothingButton => CClothingButton;
-        private OptionButton _backpackButton => CBackpackButton;
         private OptionButton _spawnPriorityButton => CSpawnPriorityButton;
         private SingleMarkingPicker _hairPicker => CHairStylePicker;
         private SingleMarkingPicker _facialHairPicker => CFacialHairPicker;
@@ -408,33 +400,6 @@ public HumanoidProfileEditor(IClientPreferencesManager preferencesManager, IProt
 
             #endregion Hair
 
-            #region Clothing
-
-            _clothingButton.AddItem(Loc.GetString("humanoid-profile-editor-preference-jumpsuit"), (int) ClothingPreference.Jumpsuit);
-            _clothingButton.AddItem(Loc.GetString("humanoid-profile-editor-preference-jumpskirt"), (int) ClothingPreference.Jumpskirt);
-
-            _clothingButton.OnItemSelected += args =>
-            {
-                _clothingButton.SelectId(args.Id);
-                SetClothing((ClothingPreference) args.Id);
-            };
-
-            #endregion Clothing
-
-            #region Backpack
-
-            _backpackButton.AddItem(Loc.GetString("humanoid-profile-editor-preference-backpack"), (int) BackpackPreference.Backpack);
-            _backpackButton.AddItem(Loc.GetString("humanoid-profile-editor-preference-satchel"), (int) BackpackPreference.Satchel);
-            _backpackButton.AddItem(Loc.GetString("humanoid-profile-editor-preference-duffelbag"), (int) BackpackPreference.Duffelbag);
-
-            _backpackButton.OnItemSelected += args =>
-            {
-                _backpackButton.SelectId(args.Id);
-                SetBackpack((BackpackPreference) args.Id);
-            };
-
-            #endregion Backpack
-
             #region SpawnPriority
 
             foreach (var value in Enum.GetValues<SpawnPriorityPreference>())
@@ -975,24 +940,6 @@ private void SetName(string newName)
             IsDirty = true;
         }
 
-        private void SetClothing(ClothingPreference newClothing)
-        {
-            Profile = Profile?.WithClothingPreference(newClothing);
-            UpdateCharacterRequired();
-            IsDirty = true;
-            _controller.UpdateClothes = true;
-            UpdatePreview();
-        }
-
-        private void SetBackpack(BackpackPreference newBackpack)
-        {
-            Profile = Profile?.WithBackpackPreference(newBackpack);
-            UpdateCharacterRequired();
-            IsDirty = true;
-            _controller.UpdateClothes = true;
-            UpdatePreview();
-        }
-
         private void SetSpawnPriority(SpawnPriorityPreference newSpawnPriority)
         {
             Profile = Profile?.WithSpawnPriorityPreference(newSpawnPriority);
@@ -1162,22 +1109,6 @@ private void UpdateGenderControls()
             _genderButton.SelectId((int) Profile.Gender);
         }
 
-        private void UpdateClothingControls()
-        {
-            if (Profile == null)
-                return;
-
-            _clothingButton.SelectId((int) Profile.Clothing);
-        }
-
-        private void UpdateBackpackControls()
-        {
-            if (Profile == null)
-                return;
-
-            _backpackButton.SelectId((int) Profile.Backpack);
-        }
-
         private void UpdateSpawnPriorityControls()
         {
             if (Profile == null)
@@ -1344,8 +1275,6 @@ public void UpdateControls()
             UpdateGenderControls();
             UpdateSkinColor();
             UpdateSpecies();
-            UpdateClothingControls();
-            UpdateBackpackControls();
             UpdateSpawnPriorityControls();
             UpdateAgeEdit();
             UpdateEyePickers();