Update subscription and query builder docs

[joshua-spacetime]

Description of Changes

This patch does the following:

• Adds api reference docs for the module-side query builder in the view docs
• Merges the client sdk and subscription docs pages
• Keeps subscription and client overview docs high-level (moved all api docs to the language reference docs)
• Replaces SQL examples in the docs with the query builder
• Replaces SQL subscriptions in the templates with the query builder

Note, the last commit in this patch set transitions the templates over to use the query builder instead of SQL subscriptions. This will break them temporarily until #4000 merges.

Also note, a lot of this was AI assisted. It can still be improved upon, but it's in a better state than it was.

API and ABI breaking changes

N/A

Expected complexity level and risk

1

Testing

N/A

[cloutiertyler]

This now LGTM. I do have some concern about the t.array thing.