* docs(readme): simplify vsc_quill_delta_to_html description
* chore: drop the support for DeltaX.fromHtml and DeltaX.fromMarkdown to only use them internally
* docs(readme): update outdated docs, suggest packages to convert between Delta and Markdown or PDF
* chore: deprecate customBlocks in DeltaX.fromHtml property
* Initial set of tests for QuillController
* Basic text input test for QuillEditor widget
* Add test for Android keyboard image insertion
* Add tests to validate fixes for #1189
* Export test utilites