Extend our ORM-ish FFI functionality

[ra0x3]

• The indexer service makes calls in/out of individual indexer WASM runtimes using FFI functionality
• This works great so far, and gives us the ability to load .load() and save .save() functionality
• This is cool, but somewhat limiting in that users can only save a single record, and load a single record at a time
• We should extend this functionality to cover a few more basic cases:
  • Finding single records .find()
  • Finding many records .find_many()
  • Updating single records .update()
  • Updating many records .update_many()
  • Ordering records .sort()
  • Saving many records .save_many()

Additional context

• I think Prisma has a good-looking, Rust-y way of doing this https://prisma.brendonovich.dev/reading-data/find
• We should definitely create a design doc for this before writing any code, as we will need a big docs update for this work