Remove Entity Embed option in Rich text editor

[kevwalsh]

Background

At some point entity embed was added to the rich text editor, with a File autocomplete widget. Original "entity embed" issue from Jira: https://va-gov.atlassian.net/browse/VAGOV-5784

It's not a great UX for editors.

• the E button is ambiguous
• the file autocomplete is pretty opaque.

It encourages a pattern that is discouraged in the design system.

Also, there are bugs associated with the front end build of these embedded entities, with file URLs that are not properly rewritten. department-of-veterans-affairs/va.gov-team#13455 ... files are only available from within the VA network.

User Story or Problem Statement

We need to decide if this should be improved or removed. It's also possible to remove it for now, then relaunch it at some point in an improved state.

"Improve" approach

1. Improve the entity browser experience
1. Front end work to make these files

"Remove" approach

1. Audit to find any files that are linked this way
2. Rewrite these links as content blocks where possible (?)
3. Consider adding structured fields for files?

Affected users and stakeholders

• All editors.