add pre-commit config to enfore code quality

Author: aahnik

.pre-commit-config.yaml

@@ -0,0 +1,31 @@
+repos:
+  
+  - repo: https://github.com/pycqa/isort
+    rev: 5.8.0
+    hooks:
+      - id: isort
+        name: isort (python)
+      - id: isort
+        name: isort (cython)
+        types: [cython]
+      - id: isort
+        name: isort (pyi)
+        types: [pyi]
+      
+  - repo: https://github.com/psf/black
+    rev: 20.8b1
+    hooks:
+      - id: black
+        language_version: python3 
+        entry: black . --check
+  
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v0.812
+    hooks:
+      - id: mypy
+    
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.27.1
+    hooks:
+      - id: markdownlint
+        entry: markdownlint --ignore .github