[feat] add git conflcits picker

[Snikimonkd]

Description

git conflicts picker

This is a draft, kind of proof of work, i'll add doc and all others later.

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

2024-01-14.00.08.57.mp4

• created two branches with changes in the same files

Configuration:

• Neovim version (nvim --version): v0.9.4
• Operating system and version: macos ventura 13.5.2

Checklist:

• My code follows the style guidelines of this project (stylua)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (lua annotations)

[jamestrew]

Unfortunately, we aren't really accepting new pickers into telescope core.

In short, we're struggling to maintain the existing ~50 pickers.
See #1228 for more info.

My recommendation is to create the picker as a standalone telescope extension https://github.com/nvim-telescope/telescope.nvim/blob/master/developers.md#bundling-as-extension

[Snikimonkd]

@jamestrew, ok, i've read the doc, can you give me an example of simple standalone picker for telescope please, cause i'm not very familiar with lua and telescope code, so i need some reference :)

[Snikimonkd]

I've found the examples, sry for disturbing, nvm