feat(completion): added more mappings for copilot-lua-cmp

[Cthutu]

It is very useful to accept Co-pilot suggestions one word at a time or even a whole line. Copilot offers these features but they have not been exposed. VS Code, by default uses Ctrl+Right to accept a word. I've added similar vim-like controls:

• Ctrl+Right/L for accepting a word
• Ctrl+Down/J for accepting a line
• Ctrl+C to dismiss the suggestion

[luxus]

as many people using copilot i waiting for some comments, i don't use this version i use the normal version because i like the cmp and tab

[sjcobb2022]

I mean this is more of a preference thing no? Wouldn't it just be better to put this in the user defined opts instead?

[Cthutu]

I disagree. The ability to use copilot's complete next word and complete line is vital to partially accepting its suggestions and makes the tool more productive. The pack adds ctrl-x/z which I would argue is less useful in practice, so why not add the more important features.

This, of course, is a judgement call.

[luxus]

everyone can add their own preferences. the main reason for this config is that the tab thing is working.
not sure if adding extra keybinding is important.. imho they are optional (i don't use the word or line thing at all, and i use copilot a lot)
so i still hope some people that actually using this variant of copilot can give some input,
if we would mimic vscode this would make more sense for me

[mehalter]

Please make sure formatting and linting is passing

[justyn]

imho they are optional (i don't use the word or line thing at all, and i use copilot a lot) so i still hope some people that actually using this variant of copilot can give some input, if we would mimic vscode this would make more sense for me

I use the copilot accept_line option a lot, and should probably use accept_word more too.

But I just set them in my own keymap.

[mehalter]

Fixed the formatting/linting. LGTM