refactor(quickshell): drop the Persona names from the primitives

P5Panel, P5Button, P5Slider and P5Tooltip become Panel, ActionButton,
LevelSlider and Tooltip. ActionButton and LevelSlider avoid clashing
with QtQuick.Controls, which the ask panel imports.

quickshell/components/ChromeSurface.qml

@@ -4,7 +4,7 @@ import "root:/components"
 
 // Calm, permanent-chrome preset. It is deliberately flat and opaque: one
 // neutral hairline, no texture, no ticks, and no accent unless active.
-P5Panel {
+Panel {
     property bool active: false
     property color tone: Theme.treatmentActiveMark