feat: added trgm operators

[baszalmstra]

PR Info

Adds pg_trgm binary operators which are required to allow proper use of indexes for Postgres.

Adds

• Binary operators from the Postgres pg_trgm extension

[ikrivosheev]

@baszalmstra thank you for PR! Can you run rustfmt?

[ikrivosheev]

@baszalmstra thank you! LGTM!

I think we can also add: BinOpen::Custom for this case

[baszalmstra]

I think we can also add: BinOpen::Custom for this case

I tried adding BinOper::Custom(String) but the BinOper is Copy and String obviously isn't. Removing the Copy derive would change the API significantly.

I see a few options:

• Use &'static str, but that would limit the use
• Remove the Copy trait from BinOp
• Implement the Copy trait and use Rc, Arc, or DynIden

WDYT?

[tyt2y3]

May be we can cater custom BinOp later.