[FR] "Buttons" - literally copying Notion's feature called "buttons"

### Description

Notion has this amazing functionality they call buttons that are incredibly powerful.
I would love for Appflowy to have this feature.

please see video for demonstration : https://www.youtube.com/watch?v=TB7lZhCk-rc&t=1060s

importance : 4/5

### Impact

tremendous improvement in UX

### Additional Context

_No response_