fix: add bin field to make package executable with npx

Author: Tiberriver256

package.json

@@ -4,6 +4,9 @@
   "description": "Azure DevOps reference server for the Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
+  "bin": {
+    "mcp-server-azure-devops": "./dist/index.js"
+  },
   "files": [
     "dist",
     "docs",
@@ -16,7 +19,7 @@
     }
   },
   "scripts": {
-    "build": "tsc",
+    "build": "tsc && chmod +x dist/index.js",
     "dev": "ts-node-dev --respawn --transpile-only src/index.ts",
     "start": "node dist/index.js",
     "inspector": "npm run build && npx @modelcontextprotocol/inspector node dist/index.js",