[FR] Custom link dialog by overriding callback

[realth000]

Hello community!

This intend to be a feature request but when I dig in it, it became more complex.

Originally what I request is a customOnPressedCallback in QuillToolbarLinkStyleButton.

customOnPressedCallback is something already exists in color button:

flutter-quill/lib/src/toolbar/buttons/color/color_button.dart

Line 181 in 689b8fd

final customCallback = options.customOnPressedCallback;

Add it to QuillToolbarLinkStyleButtonOptions and QuillToolbarLinkStyleButton, like the commit here so that the whole open dialog callback can be override.

But I found QuillToolbarLinkStyleButton2Options looks quiet different. The commit mentioned above only changed the default style button, I think it's some kind ok but may need refactoring if someone request similar feature in the alternative style.

Additionaly I noticed that in #1339 the new parameter is added to shared option, not the two link button option mentioned above.

So how could we have it?