Add Support AWS Bedrock (beyond Anthropic)

[deivinsontejeda]

First at all, awesome project! congrats for this effort!

Please add support for AWS Bedrock to this Ruby LLM library, allowing access to Amazon, Anthropic, and other foundation models through AWS's unified API.

[crmne]

Thanks for the kind words! Adding Bedrock support is definitely a great idea. The unified API approach would be a good fit for our model-first philosophy. Feel free to open a PR if you'd like to take a crack at it.