[GPUI] Support inline box text layout

[MatinAniss]

Check for existing issues

• Completed

Describe the feature

Supporting the ability to have elements that flow inline with text is necessary so they correctly wrap based on the size constraints of their layout.

This can help areas in Zed where the text does not wrap due to there being elements between the text.
Example:

This Taffy issue has some useful information relating to this: DioxusLabs/taffy#627

If applicable, add mockups / screenshots to help present your vision of the feature

No response

[MatinAniss]

It seems that support for inline elements in the the text layouting will require some not so small changes to the existing text system as it looks like support for inline elements was not foreseen.