Add a column for default colours for the prompt items in the documentation under 'Items' in 'Configuration'

[bahmoudd]

Is your feature request related to a problem? Please describe

It's difficult to find the default colours of the prompt items.

Describe the solution you'd like

Add a column for each 'colour' row stating its default colour.

Example:

character

Variable	Description	Type	Default
color	color when last command completed with exit code 0	color	green

Additional context

There are two cases where the problem I mentioned can be particularly frustrating:

1. Trying to find the colour of some item and then adjusting it to fit with a certain colour scheme
2. Trying to revert the colour of some item back to its default when you have set it with set -Ux in the command line