Concat and apply git highlight inside the builder.
This allows to not leak private data from builder to the git component.
This will also now allow us to customize git icon placement.
This greatly simplifies the folder highlighting logic. It wasn't clear
before and the code was probably doing more than it should. The logic
with highlight_opened_file wasn't working at all, so i just removed it.
This should allow us to greatly extend the order in which the components
are rendered.
- use a builder pattern to mount the lines / highlights
- i think we lost a little performance, but gain in design
- code for file/folder icons is abstracted in components/icons.lua
- should also fix the issues where vim.g variables where loaded before
setup.
