refactor(renderer): refactor git handling

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.

lua/nvim-tree/renderer/init.lua

@@ -79,6 +79,7 @@ function M.draw()
       :configure_special_map(get_special_files_map())
       :configure_picture_map(picture_map)
       :configure_opened_file_highlighting(vim.g.nvim_tree_highlight_opened_files)
+      :configure_git_icons_padding(vim.g.nvim_tree_icon_padding)
       :build_header(view.is_root_folder_visible(core.get_cwd()))
       :build(core.get_explorer())
       :unwrap()