[PLUGIN] Bedrock LLM provider integration

[MilaBooot]

Changes

• Added BedrockProvider class for AWS Bedrock integration via boto3
• Supports any Bedrock model via AWS_BEDROCK_MODEL_ID environment variable
• Defaults to us.deepseek.r1-v1:0 model
• Added boto3 to requirements
• Updated README with Bedrock setup and usage instructions
• Updated docs with Bedrock configuration reference

Setup

Set the following environment variables to use Bedrock:

• AWS_REGION or AWS_DEFAULT_REGION — your AWS region
• AWS_BEDROCK_MODEL_ID — (optional) override the default model
• Standard AWS credentials (AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY)

Then use provider=Bedrock when running OmegaClaw.

[MilaBooot]

@vsbogd i would love to hear from you on this PR

[vsbogd]

I am sorry for a late response. The best way to add new LLM provider is using new plugin API being introduced by #222 . #222 is not last PR, I expect some additional changes to this API, which are planned to be included into the next release v0.1.18.

[vsbogd]

We are working on plugin API to make it possible extending OmegaClaw without merging new code into OmegaClaw-Core.

[vsbogd]

I will ping you when Plugin API will be ready. Until then this PR can just hang here, I will mark it as a plugin related.