Replace Travis with GitHub Actions

Author: Hamuko

.github/workflows/build-publish.yml

@@ -0,0 +1,38 @@
+name: Build and release
+
+on: push
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install uv
+        uses: astral-sh/setup-uv@v6
+      - name: Build
+        run: uv build
+      - name: Upload distribution artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+  publish:
+    name: Publish to PyPI
+    if: startsWith(github.ref, 'refs/tags/')
+    needs:
+      - build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/beets-mpdqueue
+    permissions:
+      id-token: write
+    steps:
+      - name: Download distribution
+        uses: actions/download-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+      - name: Publish distribution to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1