Adding Wiki pages to the repo

[thameem-abbas]

I think we should be able to give more long-form explanations on how llm-load-test is expected to behave with each back-end and endpoint configuration and a much more detailed explanation of the parameters available for the user to modify/tune in the config file. Adding complete explanations of each of the parameters would ruin the readability of the config file.

Example:

format_prompt is a parameter available under dataset in the config that a user will never be aware of unless they dig around the code. It has never been part of the config before. If I were to add information like this, the config would quickly become unreadable.