Fix paste text mess up style and Add support copy/cut block text.

[TheHeBoy]

• Fix paste text mess up style
• Add support copy/cut block text.

Demo:

2023-07-22.10-16-38.mp4

Issue:#1313

[singerdmx]

info • The import of '../../models/documents/document.dart' is unnecessary because all of the used elements are also provided by the import of '../../../flutter_quill.dart' • lib/src/widgets/raw_editor/raw_editor_state_selection_delegate_mixin.dart:7:8 • unnecessary_import
info • The import of '../../models/documents/nodes/embeddable.dart' is unnecessary because all of the used elements are also provided by the import of '../../../flutter_quill.dart' • lib/src/widgets/raw_editor/raw_editor_state_selection_delegate_mixin.dart:8:8 • unnecessary_import
info • The import of '../../models/documents/nodes/leaf.dart' is unnecessary because all of the used elements are also provided by the import of '../../../flutter_quill.dart' • lib/src/widgets/raw_editor/raw_editor_state_selection_delegate_mixin.dart:9:8 • unnecessary_import
info • The import of '../editor.dart' is unnecessary because all of the used elements are also provided by the import of '../../../flutter_quill.dart' • lib/src/widgets/raw_editor/raw_editor_state_selection_delegate_mixin.dart:11:8 • unnecessary_import

[singerdmx]

Please don't use '../../../flutter_quill.dart'

[singerdmx]

Please don't use '../../../flutter_quill.dart'

[TheHeBoy]

I have a question: If I paste to a line with the style, apply the original style or style of paste position?

[singerdmx]

Try it in word and we should be the same

[TheHeBoy]

Ok, I will again pr resolve this question.

[TheHeBoy]

Do I need to update changeLog about this bug?

[singerdmx]

Yes