quickshell: add initial bar config with per-monitor workspaces

- Vertical bar on DP-2 with rounded-square pills throughout
- Per-monitor workspace groups sorted by screen x position, with
  Nerd Font icons for named workspaces and apex-neon red active indicator
- Bar layout: datetime+weather top, workspaces centered, gamemode+media+notif+system bottom
- Popouts anchor to triggering icon (top-right for datetime/weather, bottom-right for media/notif/system)
- Lock command switched from hyprlock to swaylock
- Hyprland blur/ignore_alpha layerrules for quickshell namespace

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

dot_config/quickshell/shared/Time.qml

@@ -0,0 +1,15 @@
+pragma Singleton
+
+import Quickshell
+import QtQuick
+
+Singleton {
+    readonly property string clock: Qt.formatDateTime(systemClock.date, Config.clockFormat)
+    readonly property string clockSeconds: Qt.formatDateTime(systemClock.date, Config.clockSecondsFormat)
+    readonly property date date: systemClock.date
+
+    SystemClock {
+        id: systemClock
+        precision: SystemClock.Seconds
+    }
+}