Add nano to integrations

[Yash-Singh1]

📑 Summary

Brief description of the content of your PR.

Adds nano editor to the integrations

📏 Design Decisions

Describe the way your implementation works or what design decisions you made if applicable.

I made it with a nanorc file: https://github.com/Yash-Singh1/nano-mermaid/blob/main/mermaid.nanorc

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added unit/e2e tests (if appropriate)
• 🔖 targeted develop branch

[ashishjain0512]

Thanks for the update!