experimental: support element component in rich text (#5203)

Ref #3632

Now when element rich text component is detected all children like bold,
italic, link etc are created with element component.

Old rich text components are still using legacy rich text content
components.

<img width="571" alt="Screenshot 2025-05-12 at 12 47 43"
src="https://github.com/user-attachments/assets/82b1a36e-6efb-40c0-b77c-668a66da6724"
/>

Author: TrySound