[Feature Request] Support Git Icons

[fr-rustyphillips]

See nerdtree-git-plugin (https://github.com/Xuyuanp/nerdtree-git-plugin), which does this by default:
let g:NERDTreeGitStatusIndicatorMapCustom = { \ 'Modified' :'✹', \ 'Staged' :'✚', \ 'Untracked' :'✭', \ 'Renamed' :'➜', \ 'Unmerged' :'═', \ 'Deleted' :'✖', \ 'Dirty' :'✗', \ 'Ignored' :'☒', \ 'Clean' :'✔︎', \ 'Unknown' :'?', \ }

[ms-jpq]

humm this is more of a theme thingy, not too hard to add, i just need to figure out which status code maps to what,

honestly though, a 1:1 mapping with git is more clear imo. I have no idea what some of these status even are, oh well, if i implement it, i will figure it out

[fr-rustyphillips]

Even if you implemented just dirty and clean it would be better than just showing traditional ascii characters.

This is a feature already supported by both of the other main tree plugins. I was kind of surprised it wasn't in Chadtree considering how advanced it is in most other ways.