Cleanup query info, hint and add synonym support.

[ChillFish8]

Renames an endpoint to suggest that it's more of a hint than a list of corrections.

[ptming]

@ChillFish8 how does one use the hint endpoint?
I've sent over requests to the endpoint but the value for hint in the response payload is always whatever string I sent over in the request query field. Not getting back correction suggestions

[ptming]

@ChillFish8 does this endpoint work?

[ChillFish8]

Yes, but it behaves a bit weirdly since it only attempts to suggest spelling mistakes in the sentence so that a query would match documents.