[FEATURE] Extra templates that can be placed at random in Extrasign's AutoSign

[ImSwordQueen]

What feature would you like to be added. Currently ExtraSign allows only one sign template that can be put on a sign instead of having a system that allows you to add more sign templates that autosign will pick at random and place on a sign.

Is your feature request related to a problem? Please describe. It would be an useful feature to have for people that place a lot of signs with something as it makes the placed signs more unique instead of looking the same from the other

Additional context