Add excluded folder list for flake and mypy

.flake8

@@ -3,4 +3,4 @@ max-line-length = 88
 select = B,BLK,C90,E,F,I,W
 max-complexity = 15
 extend-ignore = E203
-exclude = *.pyi
+exclude = .git,.venv,.vscode,__pycache__,runtime,*.pyi

Makefile

@@ -30,7 +30,7 @@ flake8:
 
 # This runs the static type checking
 mypy:
-	@poetry run mypy --strict --namespace-packages --implicit-reexport .
+	@poetry run mypy --strict --exclude '.venv/.*' --namespace-packages --implicit-reexport .
 
 # Print current Python virtualenv
 venv: