[DOCS] Documentation of breaking changes

[MatrixEditor]

Breaking changes should be documented more explicitly. Therefore, what should be done:

• Create a documentation page that lists/references all breaking changes
• Each breaking change should be documented in its corresponding class using .. versionchanged::
• The main README should contain a link to a list of all breaking changes
• Warnings should be added (where appropriate) to support UX - e.g. str as second parameter of Prefixedshould result in a warning that points out the breaking change