feat : Update Readme.md

[Abhishek-Mallick]

The Readme needs to be updated

• Details about the project
• Installation procedure
• Steps to contribute further
• Steps designing the LLM model

[MaryamMansour]

can i work on it? I'll update it as much as possible .. assign me

[mdnazisharman2803]

@MaryamMansour please go ahead