Use Ruff linter and formatter

Author: angely-dev

.github/workflows/python-package.yml

@@ -22,10 +22,13 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install black mypy
-    - name: Check code formatting
+        python -m pip install ruff mypy
+    - name: Check Ruff linting
       run: |
-        black --check .
+        ruff check --extend-select I
+    - name: Check Ruff formatting
+      run: |
+        ruff format --check --line-length=120
     - name: Check static typing
       run: |
         mypy --strict diffplus/