[FEATURE] Support blink.cmp

[h3xOo]

Is your feature request related to a problem? Please describe.

Could we get support for blink.cmp's highlight groups?

Describe the solution you'd like

I think most of them can be linked to corresponding nvim-cmp's groups. Actually, that's what they're doing with nvim-cmp fallback enabled https://github.com/Saghen/blink.cmp/blob/main/lua/blink/cmp/init.lua#L88 (which "will be removed in a future release, assuming themes add support" [taken from plugin's README])

[ellisonleao]

we already have support for nvim-cmp and it seems blink links their highlight groups with already existing groups on our side. Do we have any links that are missing on our side?

[Saghen]

I'm planning to remove that option for 1.0. I added it temporarily so that people could try the plugin without having to modify their theme too

[tim3nd]

Hi I'm trying to add basic blink.cmp highlight groups based on existing config, can you give me some advice to help make this better?

PR link