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

pnpm-lock.yaml

@@ -569,6 +569,9 @@ importers:
         specifier: workspace:*
         version: link:../../../framework/behavior-tree
     devDependencies:
+      '@esengine/asset-system':
+        specifier: workspace:*
+        version: link:../../../engine/asset-system
       '@esengine/build-config':
         specifier: workspace:*
         version: link:../../../tools/build-config
@@ -1861,6 +1864,9 @@ importers:
 
   packages/physics/rapier2d:
     devDependencies:
+      base64-js:
+        specifier: ^1.5.1
+        version: 1.5.1
       rimraf:
         specifier: ^5.0.0
         version: 5.0.10