Add workflow for pushing to pypi

.github/workflows/publish-to-pypi-and-test-pypi.yml

@@ -0,0 +1,74 @@
+name: Publish mal-gui to PyPI and TestPyPI
+
+on: push
+
+jobs:
+    build:
+        name: Build Python distribution
+        runs-on: ubuntu-latest
+
+        steps:
+        - uses: actions/checkout@v4
+        - name: Set up Python
+          uses: actions/setup-python@v5
+          with:
+            python-version: "3.x"
+
+        - name: Install pypa/build
+          run: >-
+            python3 -m
+            pip install
+            build
+            --user
+
+        - name: Build a binary wheel and a source tarball
+          run: python3 -m 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/')  # only publish to PyPI on tag pushes
+      needs:
+      - build
+      runs-on: ubuntu-latest
+      environment:
+        name: pypi
+        url: https://pypi.org/p/mal-gui
+      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
+
+    publish-to-testpypi:
+      name: Publish Python distribution to TestPyPI
+      if: startsWith(github.ref, 'refs/tags/')  # only publish to PyPI on tag pushes
+      needs:
+      - build
+      runs-on: ubuntu-latest
+      environment:
+        name: testpypi
+        url: https://test.pypi.org/p/mal-gui
+      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 TestPyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/