feat: Further improved plugin management (upload and activation and toolbar compatibility

bin/Editor.js

locale.xml

plugins/ckeditor4/ckawesome/dialogs/ckawesome.css

plugins/ckeditor4/ckawesome/dialogs/ckawesome.js

plugins/ckeditor4/ckawesome/icons/ckawesome.png

plugins/ckeditor4/ckawesome/plugin.js

...keditor4/ckawesome/resources/select2/select2.full.min.css

...ckeditor4/ckawesome/resources/select2/select2.full.min.js

plugins/ckeditor4/ckeditortablecellsselection/.gitattributes

plugins/ckeditor4/ckeditortablecellsselection/.gitignore

plugins/ckeditor4/ckeditortablecellsselection/LICENSE

plugins/ckeditor4/ckeditortablecellsselection/README.md

...editortablecellsselection/ckeditortablecellsselection.gif

...or4/ckeditortablecellsselection/js/tablecellsselection.js

plugins/ckeditor4/ckeditortablecellsselection/plugin.js

...keditortablecellsselection/styles/tablecellsselection.css

src/QUI/Ckeditor/Plugins/Manager.php