Error/Feature option: Deleting WP post and trying to re-import to WP

Reproduce error

1. Write a post in Google Docs
2. Open the extension and import post to WP
3. Open your U/I on WP.com and permanently delete the post
4. Go back to Docs, open the extension. Click "update"
5. See the error in the bottom banner that reads "unknown post"

Feature option -> add a "create new post" button instead of just having an "update" button. You can't update a post that is deleted, and unfortunately, that is the only option the extension gives the user after the importing the post once.

Reproduce the Google Docs extension workflow by importing a post to WordPress.com, permanently deleting it, and clicking "update". Trace the update action and the bottom-banner "unknown post" error, then define the new-post option's behavior for a deleted post. Done means the extension offers a way to create a new WordPress post instead of only updating the missing one.

Written by the indexing model from the issue text.