New partition component

[olivierauverlot]

Provides a mechanism to define custom pagination rules.

It allows splitting records on the generated page based on a user-specified partitioning criterion, ensuring controlled data distribution across pages.

[olivierauverlot]

[olivierauverlot]

[lovasoa]

The compact control does not reveal the active facet while it is closed: the button says Classes, while the active Constitution value is only visible after opening the menu.

[lovasoa]

Added optional dropdown_title for compact facets. Item rows are streamed after the dropdown button, so the template cannot derive the active item title before rendering that button. The query can now supply the selected title explicitly; it defaults to description when omitted.