[ADF-5378] ADF Previewer: Image Rotate + Save (#6958)

* updates including cropperJS

* update on rotation + unit tests

* small fix

* hide toolbar on save

* remove unused & duplicate method

* added readonly & prettier code

* include readOnly mode to hide/show media management actions

* updated dependencies

* fix emit spy

* ADF-5378: Fix failing e2es

* Fix comments for unit tests

* ADF-5378: Removed obsolete buttons from e2e

Co-authored-by: kristian <kristian.dimitrov@alfresco.com>
Co-authored-by: adomi <ardit.domi@alfresco.com>

lib/core/viewer/components/viewer.component.scss

@@ -1,4 +1,5 @@
 @import '~@angular/material/theming';
+@import '~cropperjs/dist/cropper.min.css';
 
 @mixin adf-viewer-theme($theme) {
     $background: map-get($theme, background);