Changes in main-highlighter.zsh:
- Added coloring for files
- Colors definition are taken from $LS_COLORS environment variable
- Both 8 and 256 colors terminal are supported.
- Only $(basename file) is colored differently, $(dirname file) stay as defined in "path" style
- Small change in _zsh_highlight_main_highlighter_check_path ($BUFFER -> $LBUFFER)