Large Language Model (LLM) : Add llama.cpp as an external module

[joiskash]

Is your feature request related to a problem? Please describe.
Add a transform module that can support text to text transform using an LLM. We can add llama.cpp to Aprapipes. It can run many different llama based models and others.

https://github.com/ggerganov/llama.cpp

Things to consider:

1. We may need to build a text input sink.
2. Connect it with the whisper module in issue Automatic Speech Recognition (ASR) : Integrate Whisper.cpp as an external module in ApraPipes #321