Added llama unoptimized model code sample

[aidan-ricci]

Amazon Bedrock Agent Samples Pull Request

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• Do not erase any parts of this template that are not applicable to your pull request.
• If a section is not applicable, explicitly state the reason.
• • Tick the checkboxes for the items you have completed.
• These are mandatory requirements, not mere suggestions.

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Describe your changes

• I added two files to the unoptimized model code sample.
• agent_llama.py, a agents python that has updated methods for a cross-region inference profile
• llama.ipynb, a notebook which creates the same restaurant agent as the mistral code sample, but with llama to show that it can be done with llama as well

Changes to ..., because ...

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Issue ticket number and link

• Issue # (if applicable)

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All Submissions:

• [y ] Have you followed the guidelines in our Contributing document?
• [y ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• [n ] Are you uploading a dataset?
• [ n] Have you added contributions to RELEASE NOTES?

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New Example Submissions:

• [ y] Have you tested your code, and made sure the functionality runs successfully? Provide screenshots.
• [ y] Have you linted your Python code with black?
• [ n] Does this implementation use the shared tools src/utils/*. List them here:

1. web_search
2. ...

• [n ] Does this implementation use the helper functions src/utils/*. List them here:

1. bedrock_agent_helper.py
2. ...

• [ y ] Have you included your Agent Example name and introduction in README.md and examples/agents/README.md?
• [n/a ] Have you included your Multi-Agent Example name and introduction in README.md and examples/multi_agent_collaboration/README.md?
• [ y] Have you documented Introduction, Architecture Diagram, Prerequisites, Usage, Sample Prompts, and Clean Up steps in your example README?
• [ y ] I agree to resolve any issues created for this example in the future.

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src/utils Submissions:

Changes to the utils folder won't be accepted. Instead, open a new issue.

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src/shared tool Submissions:

Changes to existing tools won't be accepted. Instead, open a new issue.

• Business justification for including a new tool

This tool is necessary because ...

• How is this tool implemented?
  • • AWS CDK
  • • AWS CloudFormation (recommended)

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• [ y] Add your name to CONTRIBUTORS.md :D

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