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/tauri.build.gradle.kts

@@ -0,0 +1,6 @@
+// THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+val implementation by configurations
+dependencies {
+  implementation(project(":tauri-android"))
+  implementation(project(":tauri-plugin-opener"))
+}