`cut` counts bytes instead of printable character, making it truncate
colored lines too early.
Fix this by using awk and adding the length difference between a colored
and uncolored version to the allowed length.
COLUMNS is a shell variable and thus needs exporting for `ENVIRON` to
see it in awk.
List all files and directories but include the latest commits date and
subject, similar to the file browser in web-UIs of services like GitHub.
Also sort the entries by the commits date and time to see the most
recent changed files/folders at the bottom.
