ModernMenu with customization by Adapts

Modern Menus 1.1.1 - Theme system

NEW
- Fully customizable menus with JSON themes (config/modernmenus/themes), in the spirit of CustomMainMenu.
- Customize the main menu, pause menu, loading screens, and your own custom pages.
- Keyframe animations: on open, loop (with yoyo), on hover and on click, with 20 easing curves.
- Particles: snow, rain, embers, stars, fireflies, bubbles and dust.
- Images from your theme or from any game/mod texture, including animated sprite sheets and slideshows.
- 5 button styles: modern, flat, text, vanilla and image (your own textures).
- Text variables ({player}, {mods}, {biome}, {x} {y} {z}...) and automatic translations.
- Actions: custom pages, web links, join a server in one click, load a world...
- Conditions: show or gray out elements in singleplayer, multiplayer, LAN, or if a mod is installed.
- Press F5 on a menu to reload the theme instantly. Errors are shown on screen with the file and element number.
- In-game theme picker (Themes button).
- Two built-in themes: Default (the previous look) and Showcase (a demo of every feature).
- Full creator guide: THEMES.md.

FIXES
- Raw translation keys (like "modernmenus.info.world") are no longer shown: the mod now has built-in English fallback texts.
- Built-in themes now use plain text labels.

CHANGES
- Layout options were removed from the config file, since the layout now lives in themes.
- Built-in theme files are now clean JSON, without comments.