CI: Add publish job

Author: ayalash

.github/workflows/main.yml

@@ -7,8 +7,7 @@ on:
     # manually triggered
 
 jobs:
-  build:
-
+  test:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -32,3 +31,34 @@ jobs:
           uv venv
           uv pip install ".[testing]"
           .venv/bin/pytest tests
+
+  publish:
+    if: startsWith(github.ref, 'refs/tags/')
+    needs: test
+    runs-on: ubuntu-latest
+    environment: release
+    permissions:
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install hatch
+        run: pip install hatch
+
+      - name: Build package
+        run: hatch build
+
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          attestations: true
+          skip-existing: true