Use Strings in parameterized type

[sloanelybutsurely]

The TypeID structs aren't very portable in practice. Implementing protocols only goes so far.

Structs are particularly challenging when attempting to pattern match on things that are always strings like pubsub topics

[zolrath]

I've got a fairly rudimentary use of TypeID so far, but I've definitely been needing to call TypeID.to_string quite a bit when creating forms. Would love to see this!