Document how to create table with correct schema

[wjones127]

It seems like this requires a dynamodb table to created with a particular name for hash and range key, but those aren't described in the docs. Users will get a generic "The provided key element does not match the schema" if they mess this up, without knowing what the correct schema is.

https://delta-users.slack.com/archives/C013LCAEB98/p1695725222273019

[wjones127]

This might be it: https://github.com/delta-io/kafka-delta-ingest#writing-to-s3

[rtyler]

Here's a terraform example from a real production use-case