Allow to use .multi as .load for long queries

[sobrinho]

Hi,

We have a big query that raises that error:

Typesense::Error::RequestMalformed (Query string exceeds max allowed length of 4000. Use the /multi_search end-point for larger payloads.)

To workaround, we changed this:

MyIndex.search(query: query, query_by: query_by).facets(facets).sort(sort).filter(filter).page(page).per(per).load

To

Typesensual::Search.multi(MyIndex.search(query: query, query_by: query_by).facets(facets).sort(sort).filter(filter).page(page).per(per))[0]

Which is pretty much the same but using the multi endpoint.

We could have a helper method on the Search object to use this:

MyIndex.search(query: query, query_by: query_by).facets(facets).sort(sort).filter(filter).page(page).per(per).multi

Instead of

MyIndex.search(query: query, query_by: query_by).facets(facets).sort(sort).filter(filter).page(page).per(per).load

I would even say that we could rescue from that error automatically or even always use the multi endpoint since it is more robust.

What are your thoughts?