feat: Refactor server implementation to support Bun and Node environments

- Introduced `ServerNode` and `BunServer` classes to handle server logic for Node and Bun respectively.
- Updated `App` class to initialize the appropriate server based on the runtime environment.
- Enhanced `parseBody` function to handle request body parsing for both environments.
- Modified WebSocket handling to support Bun's WebSocket upgrade mechanism.
- Improved error handling and response structure across the server implementation.
- Added support for custom middleware in the server's request handling.
- Refactored server base functionality into `ServerBase` for better code organization.
- Updated type definitions to reflect changes in server options and listener handling.
- Added a new demo for testing the server functionality with various request types.

package.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://json.schemastore.org/package",
   "name": "@kevisual/router",
-  "version": "0.0.41",
+  "version": "0.0.42",
   "description": "",
   "type": "module",
   "main": "./dist/router.js",
@@ -20,6 +20,7 @@
   "keywords": [],
   "author": "abearxiong",
   "license": "MIT",
+  "packageManager": "pnpm@10.26.0",
   "devDependencies": {
     "@kevisual/local-proxy": "^0.0.8",
     "@kevisual/query": "^0.0.32",
@@ -27,6 +28,7 @@
     "@rollup/plugin-commonjs": "29.0.0",
     "@rollup/plugin-node-resolve": "^16.0.3",
     "@rollup/plugin-typescript": "^12.3.0",
+    "@types/bun": "^1.3.5",
     "@types/node": "^25.0.3",
     "@types/send": "^1.2.1",
     "@types/ws": "^8.18.1",
@@ -38,6 +40,7 @@
     "ts-loader": "^9.5.4",
     "ts-node": "^10.9.2",
     "tslib": "^2.8.1",
+    "tsx": "^4.21.0",
     "typescript": "^5.9.3",
     "ws": "npm:@kevisual/ws",
     "xml2js": "^0.6.2",
@@ -96,4 +99,4 @@
       "require": "./src/*"
     }
   }
-}
+}