How do I add a hover button in a text editor？

[Anthonywck]

How to add a hover button at text editor when I select some text?

I need to develop a vscode extension. One of the features is that when I select a piece of code in the text editor, a button will hover, and clicking the button will trigger a command. How to achieve this?

I have found similar function buttons in cursor，how to achieve this feature?