add Powertools batch utility

[gabrielcolson]

"The batch processing utility handles partial failures when processing batches from Amazon SQS, Amazon Kinesis Data Streams, and Amazon DynamoDB Streams."

I ported a basic implementation of @aws-lambda-powertools/batch to Effect without using it as a peer dependencies. The Processor is provided as a Layer and we could easily add new processors (like SQS FIFO) or let the user provide a custom one.

Questions

• As we do not have a peer dependencies on @aws-lambda-powertools/batch, maybe this package could simply be called @effect-aws/batch?
• How should we handle defects like Effect.die ? With the current implementation, the processing stops at the first defect and is never handled

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