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

packages/editor/plugins/behavior-tree-editor/package.json

@@ -30,6 +30,7 @@
   "devDependencies": {
     "@esengine/ecs-framework": "workspace:*",
     "@esengine/engine-core": "workspace:*",
+    "@esengine/asset-system": "workspace:*",
     "@esengine/editor-core": "workspace:*",
     "@esengine/editor-runtime": "workspace:*",
     "@esengine/node-editor": "workspace:*",