Custom Resources System

Major update adding full custom resource support with user-friendly UI and error detection.

✨ New Features

Custom Images

• Add PNG files to .minecraft/phonk-edit-mod/custom_images/
• Hot-reload support (F3+T or reload button)
• 3 modes: Mod Only / Mix / Custom Only
• Error detection for invalid formats
• "Open Images Folder" button

Custom Audio

• Resource pack-based system (OGG Vorbis only)
• Auto-generated tutorial pack at resourcepacks/PhonkEdit-CustomSongs/
• Hot-reload support
• 3 modes: Mod Only / Mix / Custom Only
• Error detection for invalid formats
• "Open Audio Folder" button
• Automatic resource pack activation

Toast Notifications

• Achievement-style notifications (non-invasive)
• Shows loaded resource counts
• Error notifications for invalid files
• Custom icon support

UI Improvements

• Effect intensity sliders (zoom/blur/shake)
• Quick access buttons
• "Reload Custom Files" button with feedback

Bug Fixes

• Fixed thread management (replaced raw threads with ScheduledExecutorService)
• Fixed resource leaks in CustomSoundDetector
• Centralized notification logic