Connect standard verb actions to make them usuble

[AmberFennek]

get, drop, sit, leave, board, follow... verbs need to be made functional again in commands/verb.py

[AmberFennek]

• drop was updated when clothing items were added, and shifted to a verb class. TODO: add drop to standard list of locks on creation.
• get was moved to the verb class. Unlike drop, it is added to all objects by default, and rooms should default to false() so characters can not attempt to get (pick up) rooms.
• sit could use some special consideration in parsing, to allow for sit on, sit atop, etc.

All other standard verbs so far work as expected and satisfy basic functionality.