Hide template comments when publishing

[piemonkey]

Overview

Uses editor from the relevant PR, but does not actually depend on it as this would break backwards compatibility.

connected issues and PRs:

Editor PR: lblod/ember-rdfa-editor#1219
Jira ticket: binnenland.atlassian.net/browse/GN-4999

Setup

For the second part of the testing, you'll need to link to the PR version of the editor, e.g. by setting the dependency to be 10.5.0-dev.7f01e7e07f7de4b7cef5870bbcffeed2b7589674

How to test/reproduce

There are two parts to testing this:

1. As-is, the template comment node functions exactly as before.
2. With the PR version of the editor, the new export for publish button in the debug tools shows a version without template comments. The existing export buttons work as before.

Challenges/uncertainties

Backwards compatibility makes the imports a mess...

Checks PR readiness

• UI: works on smaller screen sizes
• UI: feedback for any loading/error states
• Check if dummy app is correctly updated
• Check cancel/go-back flows
• changelog
• npm lint
• no new deprecations