Finalize `README.md` for `docs` Repository

[LuminaEnvision]

Overview

We need a clear, professional, and contributor-friendly README.md for the docs repository. This file will serve as the entry point for developers, contributors, and partners looking to understand or improve DeCleanup’s tech.

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✅ Tasks

• Add project description and high-level purpose
• Include structured table of contents / project layout
• Describe each folder (e.g., architecture, contracts, guides, etc.)
• Add contribution guidelines and formatting standards
• Link related repositories (dapp, contracts, backend)
• Include contact links (Telegram, Twitter, Website)
• Add final slogan/footer

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📎 References

• Initial README draft shared by team
• Related GitHub repos:
  • /dapp
  • /contracts
  • /backend

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🔥 Goal

Have a polished and up-to-date README.md merged into main before v2.1 release and contributor onboarding sprint.