feat: add Vite configuration for Tiku.PlatformAdmin.Web and update documentation

- Introduced Vite configuration files (vite.config.js, vite.config.ts, vite.config.d.ts) for the React frontend.
- Configured server proxy settings for API endpoints.
- Added Vitest configuration files (vitest.config.js, vitest.config.ts, vitest.config.d.ts) for testing.
- Updated architecture overview to reflect the separation of the platform admin frontend into its own React project.
- Modified quickstart documentation to guide users on starting the platform admin frontend.

Tiku.PlatformAdmin.Web/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "@tiku/platform-admin",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "preview": "vite preview",
+    "generate:api": "node scripts/generate-platform-operations.mjs",
+    "test": "vitest run",
+    "check": "npm run build && npm run test"
+  },
+  "dependencies": {
+    "@ant-design/icons": "^6.0.1",
+    "antd": "6.5.0",
+    "react": "^19.2.0",
+    "react-dom": "^19.2.0",
+    "react-router": "^8.3.0"
+  },
+  "devDependencies": {
+    "@types/node": "^24.10.0",
+    "@types/react": "^19.2.2",
+    "@types/react-dom": "^19.2.2",
+    "@vitejs/plugin-react": "^5.1.1",
+    "openapi-typescript": "^7.10.1",
+    "typescript": "^5.9.3",
+    "vite": "^7.2.2",
+    "vitest": "^4.0.8"
+  }
+}