Add gh workflows

Author: JBorrow

.github/workflows/pypi.yml

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+name: Publish Python 🐍 distribution 📦 to PyPI and TestPyPI
+
+on: push
+
+jobs:
+  build:
+    name: Build distribution 📦
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v6
+
+    - name: Set up Python
+      run: uv python install 3.12
+
+    - name: Build a binary wheel and a source tarball
+      run: uv build
+    - name: Store the distribution packages
+      uses: actions/upload-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+
+    
+  publish-to-pypi:
+    name: Publish Python 🐍 distribution 📦 to PyPI
+    if: startsWith(github.ref, 'refs/tags/')
+    needs:
+    - build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/mapcat  # Replace <package-name> with your PyPI project name
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+    steps:
+    - name: Download all the dists
+      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

.github/workflows/pytest.yml

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+name: Run tests
+
+on: [push]
+
+jobs:
+  runtest:
+    env:
+      UV_SYSTEM_PYTHON: 1
+      FC: gfortran
+      CXX: g++
+      CC: gcc
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.12"]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install uv
+        uses: astral-sh/setup-uv@v6
+
+      - name: Sync uv
+        run: uv pip install ".[dev]"
+
+      - name: Run tests
+        run: pytest --cov
+        

.github/workflows/ruff.yml

@@ -0,0 +1,8 @@
+name: Ruff Formatting
+on: [ push, pull_request ]
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/ruff-action@v3