feat: Add GitHub action to run pre-commit on PRs

.github/workflows/pre_commit.yml

@@ -0,0 +1,30 @@
+name: Pre-commit checks
+
+on: pull_request
+
+jobs:
+  pre_commit:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.10'
+
+      - name: Install Poetry
+        uses: install-poetry/action@v1
+
+      - name: Install dependencies
+        run: poetry install
+
+      - name: Cache pre-commit post-installation image
+        uses: actions/cache@v2
+        with:
+          path: ~/.cache/pre-commit
+          key: ${{ runner.os }}-pre-commit-${{ hashFiles('.pre-commit-config.yaml') }}
+
+      - name: Run pre-commit on changed files
+        run: pre-commit run --files $(git diff --name-only HEAD^)