Add bufferline support

[mehalter]

I have been using bufferline recently and wanted to provide a default theme that can be easily used with it. Here is a screenshot as well:

[mehalter]

Hm looks like my PR has a stylua issue in ./lua/nightfox/util/template.lua. I am not modifying this file in this PR. Should I go ahead and fix the stylua issue?

[EdenEast]

It looks like stylua released a new version 4 days ago with a new version 0.13.0 which fixed some issues that were in the repo. I have updated the files in question. Everything looks good the only thing I would say is check for the tabs in the first section of lua/nightfox/group/modules/bufferline.lua. Once that is done we can get that merged.

[mehalter]

Ah nice catch, I forgot stylua is disabled for that section. I updated my commit to fix this

[EdenEast]

Ya I was doing that because I found that easier to read when I aligned the sections to read what the fg and bg are.

[EdenEast]

LGTM