feat(live2d): implement OpenGL ES 2.0 rendering backend with EGL support

- Add `gl.rs` for OpenGL ES 2.0 and EGL context management.
- Introduce `mod.rs` to organize Live2D plugin modules.
- Create `model.rs` for loading and managing Cubism models, including parameter handling and drawable data extraction.
- Implement shader compilation and rendering context setup for Live2D models.

.extract.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+cd /tmp
+echo "=== Extracting SDK ==="
+unzip -o cubism_sdk_native.zip -d cubism_sdk 2>&1 | tail -5
+
+echo "=== Finding Core .so files ==="
+find cubism_sdk -name "libLive2DCubismCore*" -type f 2>/dev/null
+
+echo "=== Checking arm64 linux .so ==="
+ls -lh cubism_sdk/Core/dll/experimental/linux/arm64/ 2>/dev/null
+
+echo "=== File type ==="
+file cubism_sdk/Core/dll/experimental/linux/arm64/libLive2DCubismCore.so 2>/dev/null
+
+echo "=== DONE ==="