Create 'Find' Command

[DavidRieman]

Need to create a "Find" command, which uses ThingManager.Instance to try to find the target, first by ID, then by name substring search.

E.G. "find things/void" would find and print basic info (Name?) for the room whose ID is things/void.
E.G. "find Square" would find all registered Things who have "Square" in the name (such as "City Square").

It can use the minorBuilder permissions for now. (Later when OLC is further along, a minor builder should only be able to find things in unpublished areas they have permissions to edit.)

Then consider tracking a story for later refinements (like finding classes of things, like those with specifically-typed Behaviors and matching said keyword - so the user can restrict the search to things that work like Rooms, things that works like Exits, things that work like Mobiles, and so on).

[DavidRieman]

Part of this is done: We can find square for example. Need to consider whether find rooms/ and such makes sense; probably not? But finding via description and keywords may be helpful too.