chore: add pkg.files, remove registry-url from PR workflow

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: maxholman

.github/workflows/pr.yml

@@ -21,7 +21,6 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.version }}
-          registry-url: https://registry.npmjs.org/
           cache: 'pnpm'
 
       - run: make test publint

package.json

@@ -5,6 +5,9 @@
 	"license": "MIT",
 	"type": "module",
 	"exports": "./lib/main.ts",
+	"files": [
+		"lib"
+	],
 	"scripts": {
 		"preversion": "make clean && make test && make"
 	},