Remove auto-generated napi files from version control

index.js and index.d.ts are generated by napi-rs. Generate them
at publish time via `napi prepublish` instead of checking them in.

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

.github/workflows/publish.yml

@@ -76,6 +76,18 @@ jobs:
         with:
           path: napi/artifacts
 
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        working-directory: napi
+        run: bun install
+
+      - name: Generate JS bindings
+        working-directory: napi
+        run: bunx napi prepublish --skip-gh-release
+
       - name: Collect binaries and publish
         working-directory: napi
         run: |