Enhance Ckeditor - Githubissues

What happened 👀

We need to enhance Ckeditor to satisfy the client's requirements:

Add font Inter
Add function to insert image from URL (to work around the issue that could not upload GIF files to Strapi Media Library)
Add new plugin ShowBlocks https://ckeditor.com/docs/ckeditor5/latest/features/show-blocks.html
Add new plugin SourceEditing https://ckeditor.com/docs/ckeditor5/latest/features/source-editing.html