Add linting with tox

.github/workflows/check.yml

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+name: check
+on:
+  push:
+  pull_request:
+
+concurrency:
+  group: check-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: test with ${{ matrix.py }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        py:
+          - "3.12"
+        os:
+          - ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Setup python for test ${{ matrix.py }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.py }}
+      - name: Install tox
+        run: python -m pip install tox-gh>=1.2
+      - name: Setup test suite
+        run: tox -vv --notest
+      - name: Run test suite
+        run: tox --skip-pkg-install

tox.ini

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+[tox]
+envlist = flake8,black,isort,test
+
+[flake8]
+ignore = E731,W504,W503
+max-line-length = 100
+exclude =
+    ./.tox
+    ./.git
+    ./.env
+    ./.direnv
+[isort]
+profile = black
+
+[testenv:flake8]
+basepython = python3
+skip_install = true
+deps = flake8
+commands = flake8 {posargs}
+
+[testenv:black]
+skip_install = true
+deps = black
+commands = black --check --diff {posargs:tests}
+
+[testenv:black-format]
+# this step format code automatically based on black rules
+# it can be triggered manually
+skip_install = true
+deps = black
+commands = black {posargs:tests}
+
+[testenv:isort]
+skip_install = true
+deps = isort
+commands = isort --check --diff {posargs:.}