https://docs.advntr.dev/minimessage/index.html

make color code and gradient convenient

Where would you like to use mini messages? Item display names?

Yes, and lores

I have mentioned the issue with gradient code before. Perhaps you have encountered some difficulties, but minimassage should be simpler

I don't think you have ever mentioned gradient code to me. At least, I don't remember it, and searching this repository and the discord server for "gradient" yields 0 results.

My fault, I just have said hex color

But still a way to resolve

I haven't really looked into hex colors yet. There are simply more Github issues being created than I can implement, so some issues are not picked up for a long time.
Should I skip hex colors if I decide to implement this instead?

Bold and italics can also be implemented

This should be possible, as it provides complete functionality for text components. If you want to be compatible with old format code, such as &, it also provides methods

By the way, the text edit box should have the ability to move the cursor, at least can copy the text, please, which make edit easier

You can already copy the text with Control + C or Control + X. Actually moving the cursor will have to wait for an editor rewrite