refactor: Mod information

[Alystrasz]

Currently, to retrieve mod information from launcher, Squirrel VM must summon methods such as NSGetModDescriptionByModName, NSGetModDownloadLinkByModName, NSGetModLoadPriority etc, which all loop over the list of mods until they find the correct one (using mod name as key), which is highly ineffective: this means we need as many iterations over mods list as we need information about the mod.

To solve this problem, this PR introduces a NSGetModsInformation, which exposes all mod information to Squirrel VM at once, using a new ModInfo structure.

global struct ModInfo
{
    string name = ""
    string description = ""
    string version = ""
    string downloadLink = ""
    int loadPriority = 0
    bool enabled = false
    bool requiredOnClient = false
    bool isRemote
    array<string> conVars = []
}

This is meant to make reviewing #758 and R2Northstar/NorthstarMods#824 easier.

(I highly discourage you to look at the github diff, which is fucked up, and suggest rather looking at the changes commit per commit!)

Don't merge without mods counterpart: R2Northstar/NorthstarMods#899

Testing

1. Install both launcher and mods PRs;
2. Start the game;
3. Try to break the mod menu;
4. Connect to Northstar;
5. Try to break the server browser.