Offer other types of vals when using townie

[neverstew]

I would love to be able to whip up scripts, functions, email handlers, REST APIs etc. with Townie.

Right now, this is actually really hard to do. I've had multiple occurrences where I've got the initial prompt a little off but the core of the functionality is good, but no matter how hard I try to prompt Townie, it just won't adapt it away from a React web-app.

This could be as simple as a toggle on the screen or as complicated as getting the AI to evaluate which type by calling some external function.

[stevekrouse]

Shipped!