Pain Scale

Changelog:

• Fixed a bug in addPoints() that caused the player’s earned points to reset incorrectly.
• Added two UI components to display the current level and the progress percentage toward the next level.
• Added configuration options in the menu to control the visibility of these two components.
• Improved the .cfg configuration system with version control: a backup of the previous configuration is stored in a special folder within config/ if the version does not match the one required by the mod, and the configuration is recreated using the default settings.
• Removed unnecessary debug prints.
• Etc