Refactor Live2D plugin and renderer for improved clarity and performance

- Updated EGL and OpenGL ES integration in gl.rs for better context management.
- Simplified error handling and logging in model.rs and plugin.rs.
- Enhanced texture handling and rendering logic in renderer.rs.
- Added a script to find Cargo configuration files for easier debugging.
- Removed unused imports and dead code to clean up the codebase.

.build.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 cd /home/showen/Showen/ShowenV2
 export PATH=/home/showen/.rustup/toolchains/stable-aarch64-unknown-linux-gnu/bin:$PATH
-cargo check 2>&1 | tail -80
-echo "EXIT=$?"
+cargo check 2>&1 | grep -E "^error" | head -60
+echo "---SUMMARY---"
+cargo check 2>&1 | tail -3