Add option for multi-camera controls on the top panel to the left of visibility

[mattdawkins]

Add Multi-Camera Toolbar for Track Editing

Summary

This PR adds a multi-camera toolbar that appears in the top editor menu when a track is selected in multi-camera datasets. The toolbar provides quick access to common multi-camera editing operations without needing to navigate through dropdown menus.

Features

• Edit on Opposite Camera: Quickly switch to the opposite camera and edit/create a detection for the selected track (keyboard shortcut: e)
• Link/Unlink Tracks: Link a track to another camera or unlink the current camera from a multi-camera track
• Delete Detection: Remove a detection from the current camera/frame
• Delete Track from Camera: Remove the entire track from the current camera while preserving it on other cameras

Changes

• New Component: MultiCamToolbar.vue - A new toolbar component with multi-camera editing controls
• EditorMenu Integration: Added multicam-controls-left and multicam-controls-right slots to position the toolbar appropriately
• Settings Integration: Added toggle in Track Settings Panel and Desktop Settings to show/hide the toolbar
• Keyboard Shortcuts: Added e key shortcut for quick editing on the opposite camera

Technical Details

• Toolbar appears only when:
  • Multiple cameras are present
  • A track is selected
  • The setting is enabled (default: enabled)
• Buttons are context-aware and enable/disable based on track state across cameras
• Positioned dynamically based on the selected camera (left for primary camera, right for others)

Configuration

Users can toggle the toolbar visibility via:

• Track Settings Panel → Multi-Camera Settings → "Show Toolbar"
• Desktop Settings → Annotation Settings → "Show multi-camera toolbar"

[BryonLewis]

For some reason it had two toolbars in there and only one of them was showing in the Viewer.vue - I fixed that.

Refactored the EditorMenu.vue to use defineComponent and composition API instead of the older Options Api interface.
Moved the Visibility tools into their own AnnotationVisibilityMenu.vue
Updated all menus in the toolbar to be collapsable to their own menu instead of a row of icons. This feature is logged in the user's localStorage so it is persistent.

The chevron to the right of the section can be clicked to collapse/expand the fields

[BryonLewis]

After creating the modifications I'm approving this PR. Mostly it's just a UI change to make editing multicamera items easier. I think the other additions for the toolbar buttons to collapse and expand are better UI elements as we add more functionality.