Add pre-commit

.pre-commit-config.yaml

@@ -0,0 +1,19 @@
+repos:
+  - repo: https://github.com/psf/black
+    rev: 19.10b0
+    hooks:
+      - id: black
+  - repo: https://github.com/timothycrosley/isort
+    rev: 5.4.2
+    hooks:
+      - id: isort
+        additional_dependencies: [toml]
+        exclude: ^.*/?setup\.py$
+  - repo: local
+    hooks:
+      - id: pylint
+        name: pylint
+        entry: poetry run pylint
+        files: "./openflexure_microscope/"
+        language: system
+        types: [python]