Replace CKEditor 4

[bferguso]

CKEditor 4 is end of life as of June 2023: https://ckeditor.com/ckeditor-4/. We should either upgrade to CKEditor 5 of look at alternatives.

[apeters]

The latest ckeditor (v 4.23 and greater) now requires a license (Arches is currently pegged to full/4.24.x). This is throwing an error in current implementations of Arches. They offer a free license to open source software projects. We should either get a license from them or find and alternative to ckeditor.

example error I'm seeing in the client

ckeditor.js:370 [CKEDITOR]: The license key is missing or invalid.

If you suddenly started to see this message, this may mean you accidentally updated CKEditor 4 
to the LTS version (4.23.0 and above). This version of the editor is under commercial terms 
and requires acquiring an "Extended Support Model" contract - https://ckeditor.com/ckeditor-4-support/

[apeters]

@chiatt and @chrabyrd ☝️ I notice that we just updated the version of ckeditor in package.json

[chrabyrd]

@chiatt and @chrabyrd ☝️ I notice that we just updated the version of ckeditor in package.json

@apeters Yep! It was part of the move to npm, and it was updated to the most recent version that doesn't require a license. This was to resolve a few security issues the previous version was throwing when npm audit was run.

I do not have a strong opinion about either obtaining a license from the CKEditor org or moving to a different package, though if we choose to move to a different package Quill looks like a good candidate.

[chrabyrd]

Doing some more thinking on this and I believe we can probably get away with keeping CKEditor4 past EOL, with the argument that essentially our KOJS components have entered maintenance-only mode. But we should definitely find a modern replacement for integrating into Vue

[apeters]

@apeters Yep! It was part of the move to npm, and it was updated to the most recent version that doesn't require a license.

@chrabyrd it does seem to require a license though, hence the error message I saw in the console.

[chrabyrd]

@apeters ahh you're right, it's been reverted in #11040