Feature request: Add support for Amazon Bedrock prompt caching

[DEG-7]

Hey team, there's good news from AWS bedrock!!
It now supports prompt caching for Anthropic and Nova models, and will certainly be a must have for those who use these models in AWS (due to important cost savings).

Here is the official documentation:
https://aws.amazon.com/bedrock/prompt-caching/
https://docs.aws.amazon.com/bedrock/latest/userguide/prompt-caching.html

Thank you for all the effort put into this project.
Regards