Questions I have.

[Vkbear0]

I was wondering if this feature can be extended to adding molding on the top of the ceiling as well?

Is there a plugin available for this? or is this something developers are working on already for this program future update?

ALSO I was wondering if anyone has a roof plugin or is working on one?

[Puybaret]

Molding on the top of walls is more complicated to program (it's never a simple rectangle) and less often used than baseboards, so don't hope this feature soon.
Just place objects yourself to simulate it.

As far as I know, none of these plugins you cited exist or are available publicly.

[Vkbear0]

I can see how it might be difficult considering figuring out how to shift the ceiling up and down with the automatic crown and roofs.

However, your baseboards are a fantastic addition thank you!