feat(freeze): add scheduled freeze CLI commands#993

jd wants to merge 1 commit intomainMergifyio/mergify-cli:mainfrom

devs/jd/worktree-scheduled-freeze/I414d168066f7b5070e75520bdcbb8189d694ad72Mergifyio/mergify-cli:devs/jd/worktree-scheduled-freeze/I414d168066f7b5070e75520bdcbb8189d694ad72Copy head branch name to clipboard