add black, move setup.cfg -> pyproject.toml, separate out lint task, update CI matrix

Author: bckohan

.github/workflows/lint.yml

@@ -0,0 +1,52 @@
+name: lint
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+
+  static-analysis:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # run static analysis on bleeding and trailing edges
+        python-version: [ '3.8', '3.12' ]
+        django-version:
+          - '3.2' # LTS April 2024
+          - '4.2' # LTS April 2026
+          - '5.0' # April 2025
+        exclude:
+          - python-version: '3.8'
+            django-version: '5.0'
+          - python-version: '3.12'
+            django-version: '3.2'
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install Poetry
+        uses: snok/install-poetry@v1
+        with:
+          virtualenvs-create: true
+          virtualenvs-in-project: true
+      - name: Install Dependencies
+        run: |
+          poetry config virtualenvs.in-project true
+          poetry run pip install --upgrade pip
+          poetry install -E all
+          poetry run pip install -U "Django~=${{ matrix.django-version }}"
+      - name: Run Static Analysis
+        run: |
+          poetry run isort django_typer --check
+          poetry run black django_typer --check
+          poetry run pylint django_enum
+          poetry run mypy django_enum
+          poetry check
+          poetry run pip check
+          poetry run safety check --full-report
+          poetry run python -m readme_renderer ./README.rst -o /tmp/README.html
+          cd ./doc
+          poetry run doc8 --ignore-path build --max-line-length 100