feat: add overlay not found message for all languages

- Add a new message key 'Messages.Overlay Not Found' in messages_en_US.yml, messages_tr.yml, and messages_el.yml
- Check if the overlay file exists before creating a SkinParts object in SkinOverlayCommand.java
- Use MessagesUtil.OVERLAY_NOT_FOUND to send a message to the issuer if the overlay file is not found

core/src/main/java/com/georgev22/skinoverlay/commands/SkinOverlayCommand.java

@@ -92,7 +92,12 @@ public void overlay(@NotNull CommandIssuer issuer, String @NotNull [] args) {
         }
         SkinParts skinParts;
         try {
-            skinParts = new SkinParts(new SerializableBufferedImage(ImageIO.read(new File(skinOverlay.getSkinsDataFolder(), overlay + ".png"))), overlay);
+            File overlayFile = new File(skinOverlay.getSkinsDataFolder(), overlay + ".png");
+            if (!overlayFile.exists()) {
+                MessagesUtil.OVERLAY_NOT_FOUND.msg(issuer, new HashObjectMap<String, String>().append("%overlay%", overlay), true);
+                return;
+            }
+            skinParts = new SkinParts(new SerializableBufferedImage(ImageIO.read(overlayFile)), overlay);
         } catch (IOException e) {
             skinOverlay.getLogger().log(Level.SEVERE, "Error while trying to load the skin: ", e);
             return;

core/src/main/java/com/georgev22/skinoverlay/utilities/config/MessagesUtil.java

@@ -23,6 +23,7 @@ public enum MessagesUtil {
     OFFLINE_PLAYER("Messages.Offline Player", "&c&l(!)&c Player %player% is offline!"),
     DONE("Messages.Overlay Applied", "&a&l(!)&a Overlay %url% applied!"),
     RESET("Messages.Overlay Reset", "&a&l(!)&a Default skin applied(%player%)!!"),
+    OVERLAY_NOT_FOUND("Messages.Overlay Not Found", "&c&l(!)&c Overlay %overlay% not found!"),
     INSUFFICIENT_ARGUMENTS("Messages.Insufficient arguments", "&c&l(!)&c Insufficient arguments (%command%)"),
     COMMANDS_DESCRIPTIONS_SKINOVERLAY_HELP("Commands.Descriptions.SkinOverlay.help", "Shows the help page"),
     COMMANDS_DESCRIPTIONS_SKINOVERLAY_OVERLAY("Commands.Descriptions.SkinOverlay.overlay", "Wear a specific overlay from the plugin files"),

src/main/resources/messages_el.yml

@@ -3,7 +3,8 @@ Messages:
   Only Player Command: '&c&l(!)&c Μόνο οι παίκτες μπορούν να εκτελέσουν αυτήν την εντολή!'
   Offline Player: '&c&l(!)&c Ο παίκτης %player% είναι εκτός σύνδεσης!'
   Overlay Applied: '&a&l(!)&a Εφαρμόστηκε το επικάλυμμα %url% στον παίκτη!'
-  Overlay Reset: '&a&l(!)&a Επαναφορά προεπιλεγμένου δέρματος(%player%)!!'
+  Overlay Reset: '&a&l(!)&a Επαναφορά προεπιλεγμένου επικαλύμματος(%player%)!!'
+  Overlay Not Found: '&c&l(!)&c Το επικάλυμμα %overlay% δεν βρέθηκε!'
   Insufficient arguments: '&c&l(!)&c Μη επαρκείς παράμετροι (%command%)'
 Commands:
   Descriptions:

src/main/resources/messages_en_US.yml

@@ -4,6 +4,7 @@ Messages:
   Offline Player: '&c&l(!)&c Player %player% is offline!'
   Overlay Applied: '&a&l(!)&a Overlay %url% applied!'
   Overlay Reset: '&a&l(!)&a Default skin applied(%player%)!!'
+  Overlay Not Found: '&c&l(!)&c Overlay %overlay% not found!'
   Insufficient arguments: '&c&l(!)&c Insufficient arguments (%command%)'
 Commands:
   Descriptions:

src/main/resources/messages_tr.yml

@@ -4,6 +4,7 @@ Messages:
   Offline Player: '&c&l(!)&c %player% adlı oyuncu çevrimdışı!'
   Overlay Applied: '&a&l(!)&a %url% kaplaması uygulandı!'
   Overlay Reset: '&a&l(!)&a Varsayılan cilt uygulandı (%player%)!'
+  Overlay Not Found: '&c&l(!)&c %overlay% kaplaması bulunamadı!'
   Insufficient arguments: '&c&l(!)&c Yetersiz argüman(lar)! (%command%)'
 Commands:
   Descriptions: