Drag the bar to move it, drop the config panel

Position the bar by dragging (or click-and-holding) empty bar space
toward a screen edge, with a ghost slab previewing the target edge.
With drag for position and double-click for transparency, the bar
config panel, its inline gear button, and the omarchy-launch-bar-settings
CLI are no longer needed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

shell/shell.qml

@@ -909,10 +909,6 @@ ShellRoot {
       return JSON.stringify(shell.bar && shell.bar.debugBarGeometry ? shell.bar.debugBarGeometry() : [])
     }
 
-    function openBarConfig(): string {
-      return shell.bar && shell.bar.openConfigPanel && shell.bar.openConfigPanel() ? "ok" : "unknown"
-    }
-
     function summon(id: string, payloadJson: string): string {
       return shell.summon(id, payloadJson) ? "ok" : "unknown"
     }