Added GitHub workflow for releases on PyPI.

Author: john-hen

.github/workflows/publish.yml

@@ -0,0 +1,53 @@
+# Publish new release on PyPI.
+name: Publish release
+
+on: [workflow_dispatch]
+
+jobs:
+
+  build:
+      runs-on: ubuntu-latest
+      steps:
+
+        - name: Check out code.
+          uses: actions/checkout@v6
+
+        - name: Install Python.
+          uses: actions/setup-python@v6
+          with:
+            python-version: '3.14'
+
+        - name: Install project.
+          run:  pip install --editable .[dev]
+
+        - name: Build wheel.
+          run:  flit build --format wheel
+
+        - name: Store wheel.
+          uses: actions/upload-artifact@v4
+          with:
+            name: wheel
+            path: dist
+
+
+  publish:
+      needs:
+        - build
+      runs-on: ubuntu-latest
+      environment:
+          name: PyPI
+          url:  https://pypi.org/p/Flake8-pyproject
+      permissions:
+          id-token: write
+      steps:
+
+        - name: Download wheel.
+          uses: actions/download-artifact@v5
+          with:
+            name: wheel
+            path: dist
+
+        - name: Publish to PyPI.
+          uses: pypa/gh-action-pypi-publish@release/v1
+          with:
+            packages-dir: dist

tools/ReadMe.md

@@ -12,7 +12,5 @@ virtual environment with `pip install --editable .[dev]`.
 
 - Bump version number in `meta.py`.
 - Add dedicated commit for the version bump.
-- Tag commit with version number, e.g. `git tag 1.0.0`.
-- Push to GitHub: `git push && git push --tags`.
-- Create GitHub release from tag and add release notes.
-- Publish to PyPI: `tools/publish.py`.
+- Publish to PyPI via GitHub Action.
+- Create release on GitHub, tag it (like `v1.2.4`), add release notes.