feat: init rssKeeper - RSS 抓取、管理与检索系统

完整功能包括:
- FastAPI 后端 + SQLite + FTS5 全文搜索
- RSS 源管理、自动发现、OPML 导入导出
- 文章抓取、去重、分类、全文检索
- RSS 源健康度监控
- Vue 3 + Element Plus 暗色主题 Web UI
- 对外 REST API 供 AI 分析调用
- Docker + docker-compose 部署

frontend/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "rsskeeper-frontend",
+  "private": true,
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "vue": "^3.4.21",
+    "vue-router": "^4.3.0",
+    "element-plus": "^2.6.3",
+    "axios": "^1.6.8",
+    "@element-plus/icons-vue": "^2.3.1"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^5.0.4",
+    "vite": "^5.2.0"
+  }
+}