Ruff and Black GitHub actions.

.github/workflows/automatic-code-style-fix.yml

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+name: Automatic Code Style Fix
+
+on: [pull_request, pull_request_target]
+
+jobs:
+  auto_code_style_fix:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout ️🛒
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+          fetch-depth: 0
+
+      - name: Black ◼️
+        uses: psf/black@stable
+        with:
+          options: "-l120 -C --target-version py38 chat eval finetune generate lit_gpt notebooks pretrain quantize scripts tests xla"
+          jupyter: true
+
+      - name: Ruff ®️
+        uses: chartboost/ruff-action@v1
+        with:
+          args: --select E,W,F,S --extend-select C4,SIM,RET,PT,I001,ANN001,ANN201,ANN205,ANN206,ARG001 --ignore E501,E731,S108,S101,S113,S603,PT007,S310,E402,PT004,C408 --per-file-ignores "*/**/__init__.py":I001,"tests/*":ANN --line-length 120 --target-version py38 --fix-only
+
+      - name: Commit files ✔️
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          git diff-index --quiet HEAD || git commit -a -m "Automatic code-style fix."
+
+      - name: Pushing changes 🛠 ️
+        uses: ad-m/github-push-action@master
+        with:
+          branch: ${{ github.head_ref }}