Support for mermaid diagrams

[riceset]

ℹ️ Additional Debug Info

GitHub for iOS, Version 1.149.0 (122782244) Device: iPhone 13 (iOS 17.2.1)

[iskae]

Hi @riceset 👋

Thank you for reaching out ❤️ We already have an internal tracking issue for this 🎉 I have added your request in the trackign issue too 👍 Even though we might not be able to support fully fledged mermaid diagrams, we can try our best to show the content for mermaid diagrams 😊

Please stay tuned for our future releases 🙇

[VladimirCreator]

Duplicates: #11595.