feat: Add SkinException class to handle runtime exceptions related to…

… skin overlay

core/src/main/java/com/georgev22/skinoverlay/exceptions/SkinException.java

@@ -0,0 +1,20 @@
+package com.georgev22.skinoverlay.exceptions;
+
+public class SkinException extends RuntimeException {
+
+    public SkinException(String message) {
+        super(message);
+    }
+
+    public SkinException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public SkinException(Throwable cause) {
+        super(cause);
+    }
+
+    public SkinException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
+        super(message, cause, enableSuppression, writableStackTrace);
+    }
+}