feat(ci): add pkg-pr-new-publish job

This commit adds a new job to the GitHub Actions workflow. The job is
named 'pkg-pr-new-publish' and it runs on ubuntu-latest. It uses the
actions/checkout@v4 and oven-sh/setup-bun@v2 actions, installs
dependencies with 'bun i --frozen-lockfile', builds the project with
'bun run build', and finally publishes the package with 'bunx
pkg-pr-new publish'.

.github/workflows/ci.yaml

@@ -18,3 +18,15 @@ jobs:
       - run: bun run lint
       - run: bun run typecheck
       - run: bun run test
+
+  pkg-pr-new-publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+      - run: bun i --frozen-lockfile
+      - run: bun run build
+      - run: bunx pkg-pr-new publish