[Feature] AWS Bedrock LLMs Implementation

[simosleepwalker]

Description

With this PR, we want to add AWS Bedrock to the other available LLMs in the CheshireCat Core. In order to make it work, we need three new environment variables (which are used by boto3 in order to connect to AWS services):

• AWS_ACCESS_KEY_ID
• AWS_SECRET_ACCESS_KEY
• AWS_DEFAULT_REGION

After this PR, the user will be able to choose to use Bedrock in the same settings where they set the other LLMs.

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist:

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas

[ggiallo28]

@simosleepwalker Did you checked the AWS Plugins?

[pieroit]

@simosleepwalker thansk for this, but can be done with a plugin, chekout the one made by @ggiallo28 maybe you can submit a PR directly there and collab, or create a new one

[simosleepwalker]

Thanks @pieroit @ggiallo28 I will look into it!