[Bug] iOS copied links paste into a blank string

[chrisirhc]

Bug Description

Copied urls in iOS are pasted as blank strings, as the "uri" format is unhandled in the copy_paste handler.
Note this are copied urls, not urls that are from plain text.

How to Reproduce

On iOS:

1. Go to Github app, and open any issue. OR Go to Safari app, go to any webpage.
2. Tap on the Share button.
3. Tap on Copy.
4. Go to Appflowy, any document, and paste into the document.

Expected Behavior

The link to be pasted.

Actual Behavior

Nothing pasted.

Operating System

iOS

AppFlowy Version(s)

0.8.2

Screenshots

See https://github.com/user-attachments/assets/f5b05311-d5ad-4b50-9309-df5716cc2079 . I'm tapping "Paste" but nothing gets pasted, unless I paste into the link's text box.

Additional Context

A proposed fix that also demonstrates the issue is at #7280 .

This bug was discovered via #7214 .