Add integration with CKEditor track changes feature

[Dumluregn]

Description

This PR adds the MathType and ChemType integration with CKEditor 5.

Type of Change

Please delete options that are not relevant.

• Feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Chore (non-breaking change that doesn't add any functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (changes to documentation only)
• Refactoring (non-breaking change that improves the code structure)

Checklist

• My code follows the style guidelines of this project ( Run yarn lint to check)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings or errors
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• New and existing unit tests pass locally with my changes

How should be tested? (Manual or Automated Tests)

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce,also list any relevant details for your test configuration.

Please test if:

• plugin works as before with track changes disabled
• plugin is available after enabling track changes mode
• inserting, deleting and modifying existing suggestions works properly and created annotations are matching the operations
• there are no unexpected errors

[carla-at-wiris]

Hi @Dumluregn,

Thank you so much for your contribution. We will proceed and merge this right away!

[jgonzalez-at-wiris]

👁️