feat: social-mcp 初始实现

多平台社交自动化 MCP 服务，首批支持小红书。

- 13 个 MCP 工具：登录管理、内容浏览、发布、互动
- 13 个 REST API 端点，支持 Bearer token 认证和限流
- BrowserManager：串行队列、背压、崩溃恢复
- Cookie 持久化：原子写入、0600 权限
- 安全：DNS rebinding 防御、错误脱敏、深层日志 redact
- Docker 部署支持
- 28 个单元测试全部通过

package.json

@@ -0,0 +1,51 @@
+{
+  "name": "social-mcp",
+  "version": "0.1.0",
+  "description": "Multi-platform social media automation MCP service",
+  "type": "module",
+  "main": "dist/index.js",
+  "bin": {
+    "social-mcp": "dist/index.js"
+  },
+  "scripts": {
+    "build": "tsup",
+    "dev": "tsup --watch",
+    "start": "node dist/index.js",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "lint": "tsc --noEmit"
+  },
+  "keywords": [
+    "mcp",
+    "social-media",
+    "automation",
+    "playwright",
+    "xiaohongshu"
+  ],
+  "author": "",
+  "license": "ISC",
+  "packageManager": "pnpm@10.25.0",
+  "engines": {
+    "node": ">=22.0.0"
+  },
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.27.0",
+    "rebrowser-playwright": "^1.52.0",
+    "express": "^4.21.0",
+    "pino": "^9.0.0",
+    "zod": "^3.25.0"
+  },
+  "devDependencies": {
+    "typescript": "^5.7.0",
+    "tsup": "^8.0.0",
+    "vitest": "^3.0.0",
+    "pino-pretty": "^13.0.0",
+    "@types/express": "^5.0.0",
+    "@types/node": "^22.0.0"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": [
+      "esbuild"
+    ]
+  }
+}