Allow CMD+S / CTRL+S to update current record

# what

In the block editor, you can use keyboard shortcuts to save a post.

It would be ideal to allow the same hotkey to save/update records in Jetpack CRM.

# why

The pages in the CRM require quite a bit of scrolling, it would be nice to easily save and jump around the admin!

## example: Contacts

- Edit Contact: Jetpack CRM > Contacts > Click contact name > Contact Actions > **all sub-pages**
- Edit Contact: Jetpack CRM > Contacts > Click contact name > Documents (tab group) > **all sub-pages**
... etc

## finding affected taxonomies

WP-CLI can be used to [list Jetpack CRM surfaces](https://developer.wordpress.org/cli/commands/taxonomy/list/): `wp taxonomy list`

Start by using `wp taxonomy list` to enumerate Jetpack CRM surfaces, then inspect how the block editor handles its save shortcut and how CRM record-edit pages submit updates. Verify the shortcut across the Contacts example, its sub-pages and the other affected surfaces, with each current record saved or updated without disrupting navigation.

Written by the indexing model from the issue text.