style: set 88 as a line length limit

.flake8

@@ -0,0 +1,4 @@
+[flake8]
+max-line-length = 80
+select = C,E,F,W,B,B950
+extend-ignore = E203, E501

.pylintrc

@@ -1,3 +1,6 @@
 [MASTER]
 init-hook="from pylint.config import find_pylintrc; import os, sys; sys.path.append(os.path.dirname(find_pylintrc()))"
 extension-pkg-whitelist=pydantic
+
+[FORMAT]
+max-line-length=88

shell.nix

@@ -23,6 +23,8 @@ let
     uvicorn
     redis
     strawberry-graphql
+    flake8-bugbear
+    flake8
   ]);
 in
 pkgs.mkShell {