Add pre-commit git hooks

.pre-commit-config.yaml

@@ -0,0 +1,24 @@
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: debug-statements
+-   repo: https://github.com/ambv/black
+    rev: stable
+    hooks:
+    - id: black
+      files: ^src/
+-   repo: https://github.com/pycqa/isort
+    rev: 5.5.2
+    hooks:
+    - id: isort
+-   repo: local
+    hooks:
+    - id: pytest-check
+      name: pytest-check
+      entry: pytest
+      language: system
+      pass_filenames: false
+      always_run: true