add support for query all and scan all

[danieloh0714]

Add four new functions for getting batched data:

• queryAll: Executes a query and returns a sequence of pages that contains all results, regardless of page size. New pages will be fetched as needed when the resulting sequence is enumerated.
• queryAllContents: Executes a query and returns a sequence that contains all results, regardless of page size. New pages will be fetched as needed when the resulting sequence is enumerated.
• scanAll: Executes a scan and returns a sequence of pages that contains all results, regardless of page size. New pages will be fetched as needed when the resulting sequence is enumerated.
• scanAllContents: Executes a scan and returns a sequence that contains all results, regardless of page size. New pages will be fetched as needed when the resulting sequence is enumerated.

[kyeotic]

First, thank you for putting this together. This is an awesome feature to have.

I could accept this as is, but having built this feature in typescript there is one learning I would like to steal: query limits. The types for this are here, and the implementation is here. These are safety parameters that will cutoff what would otherwise be a complete table scan. This could be done by the caller, but stopping enumeration, but its always nice to be able to specify your guardrails up-front.

That being said, this guardrails can always be added later. If you don't feel like taking on the extra work, just add tests for this and I will take the PR.

[kyeotic]

because scanning can bring back items of the wrong type I had to change the tests. This is not something this PR introduced, its always been a tempest issue.