* 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* docs(readme): update outdated docs, suggest packages to convert between Delta and Markdown or PDF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
* fix(scripts): add execution permission for scripts/pub_get.sh
* chore(plugins)!: move super_clipboard plugin to be part of flutter_quill_extensions
* docs: add a comment for _pasteHtml() function in QuillController
* docs(extensions-package): update usage section to describe HTML and Markdown clipboard paste