Copilot Chat support

[tpope]

Creating a placeholder as I know this is a popular request. I am exploring options here, but it is not officially on the roadmap at this time. If/when it does happen, it will almost certainly happen in tandem with support in the Copilot Language Server SDK.

[yermulnik]

FWIW: https://github.com/DanBradbury/copilot.vim (it's based on top of github/copilot.vim and tracks changes from it). Works not just for NeoVim, but for regular vim too.

[DanBradbury]

@yermulnik that's a link to the original fork that I did with the hope of it making its way back into this repo. Since PRs were closed at that point I went ahead and created a completely separate plugin since there was no reliance on the LSP, etc.

The current repo I'm working on is copilot-chat.vim with the aim of brining over the functionality of the neovim chat plugin in pure vimscript

I'd love to assist with the effort of bringing my work into this repo / whatever might be required to bring the chat functionality directly to vim

[yermulnik]

@DanBradbury Thanks for info 👍🏻 Switched from older to new https://github.com/DanBradbury/copilot-chat.vim (hoping to get it versioned at some point to ease tracking of new versions).