[Rust API] Better return values for errors

[ElykDeer]

As it stands we just return Err(()) in a lot of places. We should replace all those with more informative errors.

See discussion in #2976, there's also a lot of related discussion lost to public slack history.

[emesare]

Another one is returning empty vecs instead of errors or optional values

binaryninja-api/rust/src/interaction.rs

Line 531 in ce5995c

vec![]