Ensure correct language selection (#4)

package.json

@@ -18,7 +18,7 @@
     "lint:tsc": "tsc --pretty",
     "format": "biome check --write && biome format --write",
     "test": "bun test",
-    "build": "tsup ./src/index.ts --dts --format esm",
+    "build": "tsup ./src/index.ts --format esm",
     "prepare": "bun run build"
   },
   "keywords": [
@@ -28,6 +28,11 @@
   ],
   "author": "ronin",
   "license": "Apache-2.0",
+  "tsup": {
+    "banner": {
+      "js": "#!/usr/bin/env node"
+    }
+  },
   "dependencies": {
     "@iarna/toml": "2.2.5",
     "@inquirer/prompts": "7.2.0",

src/index.ts

@@ -1,5 +1,3 @@
-#!/usr/bin/env node
-
 import { parseArgs } from 'node:util';
 
 import initializeProject from '@/src/commands/init';