Feature add Add LlamaCppChatCompletionClient and llama-cpp

[aribornstein]

This pull request introduces the integration of the llama-cpp library into the autogen-ext package, with significant changes to the project dependencies and the implementation of a new chat completion client. The most important changes include updating the project dependencies, adding a new module for the LlamaCppChatCompletionClient, and implementing the client with various functionalities.

Project Dependencies:

• python/packages/autogen-ext/pyproject.toml: Added llama-cpp-python as a new dependency under the llama-cpp section.

New Module:

• python/packages/autogen-ext/src/autogen_ext/models/llama_cpp/__init__.py: Introduced the LlamaCppChatCompletionClient class and handled import errors with a descriptive message for missing dependencies.

Implementation of LlamaCppChatCompletionClient:

• python/packages/autogen-ext/src/autogen_ext/models/llama_cpp/_llama_cpp_completion_client.py:
  • Added the LlamaCppChatCompletionClient class with methods to initialize the client, create chat completions, detect and execute tools, and handle streaming responses.
  • Included detailed logging for debugging purposes and implemented methods to count tokens, track usage, and provide model information.…d chat capabilities

Why are these changes needed?

Related issue number

Checks

• [X ] I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• [ X] I've made sure all auto checks have passed.

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 120 lines in your changes missing coverage. Please review.

Project coverage is 75.15%. Comparing base (227b875) to head (8646d54).

Files with missing lines	Patch %	Lines
...t/models/llama_cpp/_llama_cpp_completion_client.py	0.00%	115 Missing ⚠️
...n-ext/src/autogen_ext/models/llama_cpp/__init__.py	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5326      +/-   ##
==========================================
- Coverage   76.09%   75.15%   -0.95%     
==========================================
  Files         157      159       +2     
  Lines        9475     9595     +120     
==========================================
+ Hits         7210     7211       +1     
- Misses       2265     2384     +119     

Flag	Coverage Δ
unittests	75.15% <0.00%> (-0.95%)	⬇️

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[ekzhu]

Let's add a minimum version bound for this, e.g., the current stable version.

[ekzhu]

Suggested change

	"Dependencies for Llama Cpp not found. " "Please install llama-cpp-python: " "pip install llama-cpp-python"
	"Dependencies for Llama Cpp not found. " "Please install llama-cpp-python extra: " "pip install autogen-ext[llama-cpp]"

[ekzhu]

https://llama-cpp-python.readthedocs.io/en/latest/api-reference/#llama_cpp.Llama.from_pretrained

Let's keep it the same as the underlying API? We can use *kwargs to pass in additional arguments.

[ekzhu]

Add unit tests in the python/packages/autogen-ext/tests directory

[aribornstein]

Will work on this tomorrow

[ekzhu]

nit: There is a way to allow typing for **kwargs by using Unpack[] on a TypedDict. See example here:

https://github.com/microsoft/autogen/blob/main/python/packages/autogen-ext/src/autogen_ext/models/openai/_openai_client.py#L1195-L1196