[Feat] Caption for images; embed X; better UX for tooltip

[hvpexe]

Hello! I happened to come across your open-source project on daily.dev. Coincidentally, I’m also applying the Tiptap library with a few tweaks in my personal project. Taking a look at your project, I found it quite interesting, and it even has some cool features (Vietnamese language support, Excalidraw, Mermaid). However, there are still some limitations, and I hope you’ll continue to develop it in the future:

1. Add captions for images:
   

2. Embed X (Twitter)

3. (UX Bug) Tooltip should disappear when the cursor moves away from the tool.
   When hovering over a tool, the tooltip overlaps with the tool above it, causing inconvenience when moving fast from a lower tool to an upper one.
   

[hunghg255]

• Caption image
• Embed Twitter
• Fix hide tooltip