feat(python): add formatter

Author: GetPsyched

devShells/python.nix

@@ -4,6 +4,7 @@
   vscodium = {
     extensions = with pkgs.vscode-extensions; [
       ms-pyright.pyright
+      ms-python.black-formatter
       (pkgs.callPackage ../packages/ms-python.python.nix { })
     ];
   };