* feat: allow pasting markdown and HTML files from the system into the editor
* chore: format _provideFileAsBytes function parameters
* fix: use onError callback of super_clipboard to work with async await using dart Completer
* 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