cem-sort-header: Full examples and variation matrix

Public attribute inventory
Attribute	Contract
`label`	Visible or accessible owner name; component defaults apply when omitted.
`name`	Application identity included in the component event.
`direction`	ascending or descending; none, absent and unsupported values have no active sort. Native activation cycles through all three states.
`disabled`	Presence disables native user controls; programmatic state remains available.
`class`	Consumer host class; component-owned hooks use public parts.
`hidden`	Native host visibility; until-found retains browser semantics.
`dir`	Inherited native text direction: ltr or rtl.

Public attributes and slots