fix: executable npm package

Author: CodesMcCabe

package.json

@@ -8,11 +8,16 @@
   "bugs": "https://github.com/alchemyplatform/alchemy-mcp/issues",
   "type": "module",
   "main": "dist/index.js",
+  "bin": {
+    "mcp-server-alchemy": "dist/index.js"
+  },
+  "files": [
+    "dist"
+  ],
   "scripts": {
-    "build": "tsc",
-    "start": "node dist/index.js",
-    "dev": "tsx index.ts",
-    "test": "echo \"Error: no test specified\" && exit 1",
+    "build": "tsc && shx chmod +x dist/*.js",
+    "prepare": "pnpm build",
+    "watch": "tsc --watch",
     "inspector": "npx @modelcontextprotocol/inspector node dist/index.js"
   },
   "dependencies": {