[lint] add lint workflows

.github/workflows/lint.yaml

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+name: Lint
+
+on:
+  pull_request:
+
+concurrency:
+  group: lint-${{ github.workflow }}-${{ github.ref == 'refs/heads/main' && github.run_number || github.ref }}
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash -l -eo pipefail {0}
+
+jobs:
+  lint:
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        python-version: ['3.10']
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v3
+      - name: Setup python
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Update pip
+        run: python -m pip install --upgrade pip
+      - name: Install lint utilities
+        run: |
+          python -m pip install pre-commit
+          pre-commit install-hooks
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/[email protected]
+      - name: Lint modified files
+        run: pre-commit run --files ${{ steps.changed-files.outputs.all_changed_files }}

.pre-commit-config.yaml

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+exclude: 'build'
+
+default_language_version:
+  python: python3
+
+repos:
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v5.0.0
+  hooks:
+  - id: check-symlinks
+  - id: trailing-whitespace
+    args: [--markdown-linebreak-ext=md]
+  - id: end-of-file-fixer
+    exclude: '^(.*\.svg)$'
+  - id: check-yaml
+  - id: check-toml
+  - id: check-ast
+  - id: check-added-large-files
+    args: ['--maxkb=8192']
+  - id: check-merge-conflict
+  - id: detect-private-key
+  - id: debug-statements
+
+- repo: https://github.com/pycqa/isort
+  rev: 5.12.0
+  hooks:
+  - id: isort
+
+- repo: https://github.com/pycqa/flake8
+  rev: 34cbf8ef3950f43d09b85e2e45c15ae5717dc37b
+  hooks:
+  - id: flake8
+    additional_dependencies:
+      - flake8-bugbear == 22.4.25
+      - pep8-naming == 0.12.1
+      - torchfix
+    args: ['--config=.flake8']