feat: 添加 LSP 代码诊断功能

- 实现 LSP 客户端，支持与语言服务器通信
- 支持多种语言: TypeScript, Python, Go, Rust, C/C++ 等
- write_file/edit_file 工具集成 LSP 诊断，写入后自动检查代码错误
- 添加 CLI 命令管理语言服务器 (ai-assist lsp list/install/info)
- 智能等待机制：首次启动 LSP 等待 2s，后续仅需 300ms
- 将 read_file/write_file/edit_file 设为核心工具，确保文件操作使用正确的工具
- 更新系统提示词，引导 AI 使用文件工具而非 bash 命令

package-lock.json

@@ -17,6 +17,8 @@
         "inquirer": "^12.0.0",
         "ora": "^8.1.0",
         "tree-sitter-bash": "^0.25.1",
+        "vscode-jsonrpc": "^8.2.1",
+        "vscode-languageserver-protocol": "^3.17.5",
         "web-tree-sitter": "^0.25.10",
         "zod": "^4.1.13"
       },
@@ -1500,6 +1502,40 @@
       "devOptional": true,
       "license": "MIT"
     },
+    "node_modules/vscode-jsonrpc": {
+      "version": "8.2.1",
+      "resolved": "https://registry.npmjs.org/vscode-jsonrpc/-/vscode-jsonrpc-8.2.1.tgz",
+      "integrity": "sha512-kdjOSJ2lLIn7r1rtrMbbNCHjyMPfRnowdKjBQ+mGq6NAW5QY2bEZC/khaC5OR8svbbjvLEaIXkOq45e2X9BIbQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
+    "node_modules/vscode-languageserver-protocol": {
+      "version": "3.17.5",
+      "resolved": "https://registry.npmjs.org/vscode-languageserver-protocol/-/vscode-languageserver-protocol-3.17.5.tgz",
+      "integrity": "sha512-mb1bvRJN8SVznADSGWM9u/b07H7Ecg0I3OgXDuLdn307rl/J3A9YD6/eYOssqhecL27hK1IPZAsaqh00i/Jljg==",
+      "license": "MIT",
+      "dependencies": {
+        "vscode-jsonrpc": "8.2.0",
+        "vscode-languageserver-types": "3.17.5"
+      }
+    },
+    "node_modules/vscode-languageserver-protocol/node_modules/vscode-jsonrpc": {
+      "version": "8.2.0",
+      "resolved": "https://registry.npmjs.org/vscode-jsonrpc/-/vscode-jsonrpc-8.2.0.tgz",
+      "integrity": "sha512-C+r0eKJUIfiDIfwJhria30+TYWPtuHJXHtI7J0YlOmKAo7ogxP20T0zxB7HZQIFhIyvoBPwWskjxrvAtfjyZfA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
+    "node_modules/vscode-languageserver-types": {
+      "version": "3.17.5",
+      "resolved": "https://registry.npmjs.org/vscode-languageserver-types/-/vscode-languageserver-types-3.17.5.tgz",
+      "integrity": "sha512-Ld1VelNuX9pdF39h2Hgaeb5hEZM2Z3jUrrMgWQAu82jMtZp7p3vJT3BzToKtZI7NgQssZje5o0zryOrhQvzQAg==",
+      "license": "MIT"
+    },
     "node_modules/web-tree-sitter": {
       "version": "0.25.10",
       "resolved": "https://registry.npmjs.org/web-tree-sitter/-/web-tree-sitter-0.25.10.tgz",