exp: research and experiment different types of models (e.g. code-llama) for code-to-documentation generation

[anujsinha3]

Currently, autodoc uses "meta-llama/Llama-2-7b-chat-hf" model from huggingface for code-to-documentation generation.

This task involves exploring different models that can be used for code-to-documentation generation for autodoc. For example: codellama/CodeLlama-7b-Instruct-hf

[anujsinha3]

Duplicate of issue #12, #13, #14 and #15