Merge branch 'master' of https://github.com/litruv/PNGTuber-Plus

- Added opacity slider (0-100%) in sprite options with 'affect children' checkbox
- Implemented hierarchical opacity that affects entire sprite hierarchy when enabled
- Created shader-based opacity system that doesn't interfere with clip mask functionality
- Clip masks now work with original image pixels regardless of opacity settings
- Removed shadow effects from selected sprites to prevent visual conflicts
- Updated save/load system to persist opacity properties with backward compatibility

Fixes clipping behavior issues where opacity changes previously affected clip mask detection

README.md

@@ -3,6 +3,7 @@
 ![Build Status](https://github.com/litruv/PNGTuber-Plus/workflows/Build%20Windows/badge.svg)
 
 ### Recent Updates by Litruv 
+- **Opacity Controls**: Sprite opacity slider, with hierarchical "affect children" option that also preserves clip mask behavior
 - **GitHub Actions**: Automated Windows builds on every commit
 - **StreamDeck Integration**: Add buttons to enable the streamdeck plugin that was built in
 - **Rotation Wobble**: New sprite rotation effects with frequency and amplitude controls