[Bug] Pasting multiple lines of text does not work

[Harmon758]

Bug Description

Attempting to paste (CTRL + V) multiple lines of text doesn't seem to do anything.

How to Reproduce

• Have text copied that's multiple lines
• Right click on a page
• Press "Paste"
• Observe nothing happens

OR

• Have text copied that's multiple lines
• Press CTRL + V
• Observe nothing happens

Expected Behavior

The multiple lines of text should be pasted onto the page.

Operating System

Microsoft Windows [Version 10.0.19045.3086]

AppFlowy Version(s)

0.2.7

Additional Context

Similarly to #3023, I think this is due to code being removed in AppFlowy-IO/appflowy-editor#304 (AppFlowy-IO/appflowy-editor@5f136df#diff-ab095d92cb562e31ec1168184ff40ebea568dc4c47def8e3107c3ad9a0f5a009).

It might make sense to transfer this issue to https://github.com/AppFlowy-IO/appflowy-editor.