fix: update Laya examples, add CLI docs, fix changesets workflow (#340)

* fix: update Laya examples, add CLI docs, fix changesets workflow

- Update Laya examples to use Laya 3.x Script pattern (@regClass)
- Add CLI tool quick start section to README (npx @esengine/cli init)
- Fix changesets workflow to only build framework packages
- Remove unnecessary Rust/WASM build steps from changesets workflow
- Remove redundant 'pnpm build' from changeset:publish script

* docs: add CLI documentation and update Laya examples

- Add CLI quick start section to getting-started.md (zh/en)
- Update Laya examples to use Laya 3.x Script pattern

package.json

@@ -28,7 +28,7 @@
   "scripts": {
     "changeset": "changeset",
     "changeset:version": "changeset version",
-    "changeset:publish": "pnpm build && changeset publish",
+    "changeset:publish": "changeset publish",
     "bootstrap": "lerna bootstrap",
     "clean": "turbo run clean",
     "build": "turbo run build",