Add "Copy Permalink" action to post list table in admin

[solankisoftware]

Currently, copying a post or page permalink from the admin area requires opening the post or using the "View" link and copying the URL from the browser.

This ticket proposes adding a "Copy Permalink" action to the post list table in wp-admin. The action allows users to copy the permalink to the clipboard with a single click, improving editorial workflow and usability.

The change applies to:

• Posts
• Pages
• All public custom post types

The implementation:

• Adds a "Copy Permalink" row action in the admin post list table
• Uses JavaScript to copy the permalink to the clipboard without page reload
• Does not introduce any database changes

Accessibility considerations:

• The action is implemented as a button element
• Keyboard accessible
• Includes appropriate screen-reader text

Steps to Reproduce:

1. Go to wp-admin → Posts → All Posts
2. Hover over any published post
3. Click "Copy Permalink"
4. Paste the link elsewhere

Expected Result:
The post permalink is copied to the clipboard and a confirmation message is displayed.

Actual Result:
Currently, WordPress does not provide a direct way to copy permalinks from the post list table.

[solankisoftware]

Tested the patch on a local install. The "Copy Permalink" action works for posts, pages, and custom post types without PHP or JS errors.

[sabernhardt]

#57597 already proposed adding a Copy Permalink button.