clan_cli: move flake class to clan_lib

pkgs/clan-cli/clan_cli/vars/set.py

@@ -3,11 +3,11 @@ import logging
 import sys
 
 from clan_cli.completions import add_dynamic_completer, complete_machines
-from clan_cli.flake import Flake
 from clan_cli.git import commit_files
 from clan_cli.machines.machines import Machine
 from clan_cli.vars.get import get_var
 from clan_cli.vars.prompt import PromptType
+from clan_lib.flake.flake import Flake
 
 from .generate import Var
 from .prompt import ask