fix: make a separate index.js with a shebang to run as global binary (#…

…61)

Fixes #50 

I don't love having to build before running lint. Other options would be
to keep `src/index.ts` the executable and try to figure out how to make
n/shebang understand that. Or to exclude the top-level `index.js` from
linting.

.github/workflows/lint.yml

@@ -4,6 +4,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/prepare
+      - run: pnpm build
       - run: pnpm lint
 
 name: Lint

index.js

@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+import "./lib/index.js";

package.json

@@ -13,8 +13,9 @@
 	},
 	"type": "module",
 	"main": "./lib/index.js",
-	"bin": "./lib/index.js",
+	"bin": "./index.js",
 	"files": [
+		"index.js",
 		"lib/",
 		"package.json",
 		"LICENSE.md",