Update README with usage, contributing guide, and repository description

[Komali0706]

This PR updates the README.md file to include:

• A clear description of the repository and its purpose
• Instructions on how to clone and use the repository
• A contributing guide for external contributors
• References to example files, including the uploaded example:

These changes make the repository easier to understand and contribute to.

[github-actions]

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[Sharra-writes]

@Komali0706 Sorry, all the information you've added is available in the docs, it doesn't need to be rehashed in the README. We just updated the README to be what we want it to be for right now, so it's unlikely we'll accept changes to it that aren't typo fixes or inaccuracy corrections.