Add all the renderers in the rule-based layer styling

[Jean-Roc]

Feature description

Hi,

The rule-based rendering symbology does not include all the possible general renderers, it lacks :

• for point, clustering, heat-map, displacement
• for line, merged features
• for polygon, inverted, merged features

QGIS already allows to use general symbology representations such as categorized and graduated in the Refine Selected Rules menu for a point layer.

This limits simple use cases such as having cluster points above a render scale and individual point below that scale.

The workarounds exists but are not equivalent :

• using the wanted top renderer (for ex. cluster) then selecting in the Renderer menu the rule-based one
  • it does not allow to change the top renderer setting according to rules (the cluster symbol visibility, its appearance, its distance) as opposed to the categorized and graduated renderers.
• duplicating the whole layer, use the point clustering symbology and a render scale
  • it expands the layer number in the legend, masking it in the project's properties forbids the user to control the visibility
• using expressions for most
  • big learning step for an user

I have not found gh tickets on this subject but a few on stackexchange (1, 2).

Regards,
Jean-Roc

Additional context

No response