feat(repo): 整理 Qoder Skills 和 MCP 配置到仓库

- 添加 5 个用户级别 Skills:
  - auto-commit: 自动 Git 提交
  - karpathy-guidelines: 编码规范指南
  - opencli-websearch: 多源网络搜索
  - pdf-reader: PDF 内容提取
  - repo-analyzer: 项目深度分析

- 添加 Playwright MCP 配置 (21 个浏览器自动化工具)
- 创建完整的 README.md 文档说明

mcps/playwright/tools/browser_tabs.json

@@ -0,0 +1,26 @@
+{
+  "name": "browser_tabs",
+  "description": "List, create, close, or select a browser tab.",
+  "inputSchema": {
+    "properties": {
+      "action": {
+        "description": "Operation to perform",
+        "enum": [
+          "list",
+          "new",
+          "close",
+          "select"
+        ],
+        "type": "string"
+      },
+      "index": {
+        "description": "Tab index, used for close/select. If omitted for close, current tab is closed.",
+        "type": "number"
+      }
+    },
+    "required": [
+      "action"
+    ],
+    "type": "object"
+  }
+}