Add examples

[AlexKoff88]

The API of the repo allows benchmarking accuracy of many optimization backends including:

• HuggingFace (4-bit via Bytesandbits)
• GPTQ
• LLama.cpp (via bigdl-llm)
• OpenVINO (via optimum)

I suggest creating examples for all four backends and demonstrating capabilities. We can also do a comparison and publish in readme.
You can use optimized versions of llama-7B from here: https://huggingface.co/TheBloke