feat: image viewer controls (zoom & fullscreen)

[lbiedinger]

Adds a MediaImageViewerControls component to be used in the ItemMediaPresentation.

• This way it can be added to the iiif-viewer-toolbar where it is conditionally toggled for image type resources.
• Data attributes to manage zoom related variables are added to ItemMediaPresentation.
• Events for updates to the zoom levels of the openLayers map are added to the MediaImageViewer, this way the zoom levels remain synchronized.

Fullscreen support is handled in ItemMediaPresentation as this contains the ref to the element we want to make fullscreen.

• In fullscreen mode the thumbnail buttons & bar are hidden via css rules, to prevent users from switching to a non-image resource which would not contain a fullscreen toggle as this is part of the MediaImageViewerControls.

[github-actions]

Preview deployment: https://pr-2451.portal-js.dev.eanadev.org/

[sonarcloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
90.1% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud