Support for inlineCompletionProvider

[Konubinix]

Is your feature related or already mentioned on the wishlist?

Describe your feature here.

When getting completion, I try to use only the built-in capfs mechanism. The fact that lsp-mode integrates with it is great. Unfortunately, copilot.el does not and I have capfs and the ad-hoc copilot.el stuff so far.

I just realized that under the hood, copilot.el uses an lsp server : copilot-node-server, so I tried creating the lsp-copilot.el client.

But this server provides completion using the inlineCompletionProvider capability, not the completionProvider one.

I tried using https://github.com/kassick/lsp-inline-completions there are a few glitches, but it basically works. But it still does not use the capfs. So I'm back to square one.

So, I'm wondering if we could deal with completion using inlineCompletionProvider in lsp-mode, so that simply M-TAB would work seamlessly.

Is there already some discussion on the topic?