Closes#25883
This PR allows you to use copilot chat for assistant without setting
copilot as the edit prediction provider.
[copilot.webm](https://github.com/user-attachments/assets/fecfbde1-d72c-4c0c-b080-a07671fb846e)
Todos:
- [x] Remove redudant "copilot" key from settings
- [x] Do not disable copilot LSP when `edit_prediction_provider` is not
set to `copilot`
- [x] Start copilot LSP when:
- [x] `edit_prediction_provider` is set to `copilot`
- [x] Copilot sign in clicked from assistant settings
- [x] Handle flicker for frame after starting LSP, but before signing in
caused due to signed out status
- [x] Fixed this by adding intermediate state for awaiting signing in in
sign out enum
- [x] Handle cancel button should sign out from `copilot` (existing bug)
- [x] Handle modal dismissal should sign out if not in signed in state
(existing bug)
Release Notes:
- You can now sign into Copilot from assistant settings without making
it your edit prediction provider. This is useful if you want to use
Copilot chat while keeping a different provider, like Zed, for
predictions.
- Removed the `copilot` key from `features` in settings. Use
`edit_prediction_provider` instead.
6a95ec6a64