feat: add 3D model viewer, HUD panel updates, and eskin-finger-sdk submodule

- Add ModelStage component for 3D model rendering
- Update CenterStage to integrate ModelStage viewer
- Expand HudPanel with new functionality
- Add HUD type definitions
- Add je-skin-model.glb 3D model asset
- Add eskin-finger-sdk as git submodule

src-tauri/gen/android/app/proguard-tauri.pro

@@ -0,0 +1,5 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+
+-keep class com.lenn.tauri_serial.TauriActivity {
+  public app.tauri.plugin.PluginManager getPluginManager();
+}