Enforce 16-char player name limit and update mod sync

Added a maxlength attribute to the player name input and enforced a 16-character limit in both install and settings scripts, providing user feedback if exceeded. Refactored modManager.js to replace symlink-based mod management with a copy-based system, copying enabled mods to HytaleSaves\Mods and removing legacy symlink logic to improve compatibility and avoid permission issues.

GUI/index.html

@@ -120,7 +120,7 @@
                                 <label class="form-label" data-i18n="install.playerName">Player Name</label>
                                 <input type="text" id="installPlayerName"
                                     data-i18n-placeholder="install.playerNamePlaceholder" class="form-input"
-                                    value="Player" />
+                                    value="Player" maxlength="16" />
                             </div>
 
                             <div class="form-group">