Adding pre-commit to the repository

.pre-commit-config.yaml

@@ -0,0 +1,19 @@
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.2.0
+    hooks:
+    -   id: check-yaml
+    -   id: end-of-file-fixer
+    -   id: trailing-whitespace
+
+    # Opinionated code formatter to forget about formatting
+-   repo: https://github.com/psf/black
+    rev: 21.12b0
+    hooks:
+    -   id: black
+  
+  # Sort imports deterministically
+-   repo: https://github.com/pycqa/isort
+    rev: 5.10.1
+    hooks:
+      - id: isort

requirements.txt

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+black==22.3.0
+flake8==4.0.1
+isort==5.10.1
+pre-commit==2.19.0