fix(editor): fix build errors and refactor behavior-tree architecture (#394)

* docs: add editor-app README with setup instructions

* docs: add separate EN/CN editor setup guides

* fix(editor): fix build errors and refactor behavior-tree architecture

- Fix fairygui-editor tsconfig extends path and add missing tsconfig.build.json
- Refactor behavior-tree-editor to not depend on asset-system in runtime
  - Create local BehaviorTreeRuntimeModule for pure runtime logic
  - Move asset loader registration to editor module install()
  - Add BehaviorTreeLoader for asset system integration
- Fix rapier2d WASM loader to not pass arguments to init()
- Add WASM base64 loader config to rapier2d tsup.config
- Update README documentation and simplify setup steps

README.md

@@ -228,6 +228,7 @@ If you want a complete engine solution with rendering:
 A visual editor built with Tauri for scene management:
 
 - Download from [Releases](https://github.com/esengine/esengine/releases)
+- [Build from source](./packages/editor/editor-app/README.md)
 - Supports behavior tree editing, tilemap painting, visual scripting
 
 ## Project Structure
@@ -281,6 +282,7 @@ pnpm test
 
 - [ECS Framework Guide](./packages/framework/core/README.md)
 - [Behavior Tree Guide](./packages/framework/behavior-tree/README.md)
+- [Editor Setup Guide](./packages/editor/editor-app/README.md) ([中文](./packages/editor/editor-app/README_CN.md))
 - [API Reference](https://esengine.cn/api/README)
 
 ## Community