RFC for 4.x

[sedghi]

Since Cornerstone3D 2.0 introduced significant changes with extensive migration guides, we chose to limit the scope of required modifications. Here's the list of changes - please share your preferences for version 3.0.

• Move all viewports change set event to VIEWPORT_NEW_IMAGE_SET
• Remove the edge for the viewports that are reported over and over here , here
• rename the metadata and providers in Cornerstone to dcmjs style naming, so instead of sopInstanceUID we use SOPInstanceUID -> Maybe it goes to 4.0 since it is bigger
• we need to get off the sliceIndex in the viewReference, and only rely on referencedImageId, and referencedImageURI
• remove timePointIndex in favor of frameNumber in 4D (feat(4d): replace timepoint with dimensionGroupNumber for 4D handling with backward compatibility #1764)
• ToolStyle is a mess, they require the user to grab first then merge then apply, we should follow the pattern in segmentationStyle
• Move to standard for arrow annotate tools (fix(ArrowAnnotate): use svg marker to draw the arrow #1732)
• Move away from volume Id to hashed image Ids -> make volume id optional