Handle leading / for FileUtility#getResourceFiles(...)

Author: srnyx

src/main/java/xyz/srnyx/javautilities/FileUtility.java

@@ -157,6 +157,7 @@ public static void walkAndCopy(@NotNull Path source, @NotNull Path destination)
      */
     @NotNull
     public static List<String> getResourceFiles(@NotNull String resourcePath) {
+        if (resourcePath.startsWith("/")) resourcePath = resourcePath.substring(1);
         if (!resourcePath.endsWith("/")) resourcePath += "/";
         final List<String> files = new ArrayList<>();