Adds the abiltiy for fzf-lua to be used as a picker for these copilot
chat actions if it was enabled in LazyExtras
## What is this PR for?
This adds keybinds that exist currently for copilot-chat and Telescope
but with the addition of fzf-lua as an extra, I noticed we needed the
ability for the user to take advantage of them with FzfLua.
## Does this PR fix an existing issue?
No
## Checklist
- [x] I've read the
[CONTRIBUTING](https://github.com/LazyVim/LazyVim/blob/main/CONTRIBUTING.md)
guidelines.
## What is this PR for?
- Just a small fix for which-key in visual mode that the authors forgot
to add.
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## Does this PR fix an existing issue?
- As copilot-chat has just been added to extras so i think this is new.
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Fixes #<issue_number>
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## Checklist
- [x] I've read the
[CONTRIBUTING](https://github.com/LazyVim/LazyVim/blob/main/CONTRIBUTING.md)
guidelines.