docs: add Shady to Ecosystem Integrations

[shadylabdev]

This PR adds Shady to the Ecosystem Integrations section.

• Shady privacy toolkit on Solana with ZK-based access and stealth primitives:
  • Stealth Address
  • ZK Gate (view key)
  • Private Swap (Raydium aggregator + ZK access layer)
• Links:
  • 🌐 Website: https://www.shady.to
  • 📘 Docs: https://shadylabs.gitbook.io/shadylabs-docs/
  • 💬 Twitter: https://x.com/Shady_Labs
  • 💻 GitHub: https://github.com/shadylabdev/shady

This highlights Shady as a privacy-focused dApp compatible with SolanaFM’s explorer and parser ecosystem.

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[shadylabdev]

Thanks team! Adding Shady as part of the SolanaFM ecosystem integrations.
Let me know if you'd prefer this entry moved to /docs or another location.