Add GitHub Actions workflow for PyPI publishing

Publishes to PyPI automatically when a version tag (v*) is pushed.
Uses PyPI trusted publishing (no token storage needed).

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jatorre

.github/workflows/publish.yml

@@ -0,0 +1,25 @@
+name: Publish to PyPI
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    environment: pypi
+    permissions:
+      id-token: write  # Required for trusted publishing
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+
+      - name: Build package
+        run: uv build
+
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        # Uses trusted publishing - no token needed if configured on PyPI