feat(admin-web): add Vue 3 admin console and deployment configs

- Add admin-web/ with Vite + Vue 3 + Element Plus + Vue Router
- Add 8 management pages: dashboard, channel subject/account, conversation,
  person, tag, send record (with test send), inbound flow
- Add API client modules for account/channel/crm/send/flow
- Add Dockerfile and nginx config for admin-web
- Add Dockerfile for mci-server
- Add docker-compose.app.yml for one-command app deployment
- Add K8s deployment manifests for backend/admin-web/channel-service
- Update scripts/local-up.sh with shared network and --with-apps option

admin-web/src/main.ts

@@ -0,0 +1,11 @@
+import { createApp } from 'vue'
+import ElementPlus from 'element-plus'
+import 'element-plus/dist/index.css'
+import './style.css'
+import App from './App.vue'
+import router from './router'
+
+const app = createApp(App)
+app.use(ElementPlus)
+app.use(router)
+app.mount('#app')