Cobblemon Leaderboards 1.3

Changes

• Added support for loading placed leaderboards from world JSON files.
• You can now place leaderboard JSON files directly in data/cobblemon_leaderboards/placed_leaderboards.
• Improved startup loading so imported leaderboards are picked up automatically on both NeoForge and Fabric.

Fixes

• Fixed manually added leaderboard JSON files not showing up in game.
• Fixed imported leaderboards not appearing in /leaderboard list in some cases.
• Fixed world leaderboard data being lost when saved data was empty but JSON files were still present.