[FEATURE] Support for Code Embed in Rich Text Editor

[SauloSA]

First, I would like to thank you for all your contributions, which have greatly helped the community.

I would like to suggest an improvement for the Rich Text Editor library: the inclusion of the possibility to embed other screens via link, such as miro.com or even Google Sheets.

Example:

<iframe width="768" height="432" src="https://miro.com/app/live-embed/uXjVMSBJNlw=/?moveToViewport=-4235,-2580,4327,1958&embedId=632807774925" frameborder="0" scrolling="no" allow="fullscreen; clipboard-read; clipboard-write" allowfullscreen></iframe>