replace various clean code tools with ruff

Author: jschneidereit

.github/workflows/build.yml

@@ -56,22 +56,10 @@ jobs:
       - uses: actions/setup-python@v3
 
       - name: Lint code
-        uses: psf/black@stable
-
-      - name: Flake code
-        run: |
-          python -m pip install flake8 Flake8-pyproject flake8-typing-imports
-          python -m flake8 src tests
-
-      - name: Check import ordering
-        uses: isort/isort-action@master
-        with:
-          configuration: --check-only
-
-      - name: Validate pyproject.toml
         run: |
-          python -m pip install validate-pyproject[all]
-          python -m validate_pyproject pyproject.toml
+          python -m pip install ruff
+          ruff check
+          ruff format --check
 
   conda-dev-test:
     name: Conda Setup & Code Coverage