Be able to get git repository status from global variable

[Aryonal]

Description

Thanks to vim.b.gitsigns_* variables, it's really easy to get git status for a buffer. However, I don't find a similar way to fetch the repository git status. I think it would be helpful if we could get the info from a global variable.

Proposal

Create global variables for repository git status, e.g. vim.g.gitsigns_status, and vim.g.gitsigns_status_dict.

Stored information

On different verbosity levels, I would imagine the following information could be stored, from low to high

1. A flag whether the repo has changed
2. The number of changed files in total
3. Sophisticated information on numbers of files in different statuses, like modified, added, staged, etc.

[lewis6991]

Sorry but I'll pass, Gitsigns isn't needed for this.

[Aryonal]

@lewis6991 Thank you for responding!

Can I know why isn't Gitsigns needed for this? My apologise if I missed some obvious reasons, or existing implementations.

The reason I ask is that I tried to implement it on my local and it's working, if it's an acceptable feature, I would like to raise a PR if it's allowed.