PR for this exists upstream at 7696122/evil-terminal-cursor-changer#22,
but will likely never be merged (the package has been abandoned), so we
switch to the PR's repo.
- Moves clipetty to its own, opt-in module (#2671, #3195, #3498)
- Fix cursor shape changing between evil states (#1994)
- Moves `xterm-mouse-mode` and `visible-cursor` config out of core.
