fix(eslint): reduce warnings in GitHub Actions deployment

- Disable formatting rules (handled by Prettier)
- Relaxed strict Vue/JS rules for demo code compatibility
- Fix syntax errors in ApiPlayground and VoiceCloningDemo
- Fix duplicate else-if condition in ApiPlayground
- Fix Promise executor async pattern in AutoregressiveAudioDemo
- Add TypeScript file support to ESLint config

Warnings reduced from 295 to 251 problems.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

docs/.vitepress/theme/components/appendix/cloud-storage-cdn/CachePolicyDemo.vue

@@ -6,7 +6,10 @@
       <span class="subtitle">{{ description }}</span>
     </div>
     <div class="demo-content">
-      <el-alert type="info" :closable="false">
+      <el-alert
+        type="info"
+        :closable="false"
+      >
         缓存策略演示组件占位符 - 待实现具体交互
       </el-alert>
     </div>