To use this segment, you need to activate it by adding newline to your
P9K_LEFT_PROMPT_ELEMENTS or P9K_RIGHT_PROMPT_ELEMENTS array, depending
where you want to show this segment.
Puts a newline in your prompt so you can continue using segments on the next
line. This allows you to use segments on both lines, unlike
P9K_PROMPT_ON_NEWLINE, which simply separates segments from the
prompt itself.
This only works on the left side. On the right side it does nothing.