feat: emit to directory other than source root

[lbennett-stacki]

I wanted to emit straight to my dist dir, otherwise, I get a bunch of source declarations that I don't need to track in my project, as I only want to publish the types for consumers.

Without this, I would need a second step in my build to move all source declarations, and even that is a little janky.

With this change, we can set the source and output directories as simple absolute paths and be done with it 👍

[lbennett-stacki]

Ready for review @activeguild :)

[activeguild]

@lbennett-stacki Thank you. I'll review it tonight.

[activeguild]

@lbennett-stacki Can you add new options to the README?

[lbennett-stacki]

@activeguild ahh yep, will do, thanks!

[lbennett-stacki]

@activeguild ready to go! Also updated the examples, thanks again

[activeguild]

Thank you!!