Add Proper Documentation, Links and Subgraphs Mermaid Diagram to the Readme File

### Suggested Improvements to the current repo readme.md file

- [ ] Add the description of the projects and the steps required to reproduce it and use it
- [ ] Add the associated links and the contract addresses used for the graph protocol
- [ ] Add the link of the subgraph that is deployed
- [ ] Add a mermaid diagram representing the subgraph's schema. For more information about mermaid files checkout [https://mermaid-js.github.io/mermaid/](url)

Start by reading readme.md and inspect the existing project structure and subgraph schema. Document the project description, reproduction and usage steps, associated Graph Protocol links and contract addresses, and the deployed subgraph link; then add a Mermaid diagram representing the schema.

Written by the indexing model from the issue text.