Replace mako with quickshell-backed notification daemon

Adds first-party omarchy.notifications service plugin that hosts a
freedesktop notification server and renders popups + a history popup
inside the shell. Uninstalls mako and retargets every helper, keybind,
indicator, and migration entry to the new daemon.

Plugin (default/quickshell/omarchy-shell/plugins/notifications/):
- Service.qml: NotificationServer, popupModel + pendingModel + pastModel
  (two-tier history, see below), DND via PersistentProperties +
  cache-file backstop, image cache for /tmp screenshots, IpcHandler with
  toggleDnd/setDnd/isDnd/showHistory/clear/clearPending/markAllSeen/
  dismissAll/dismissOne/invokeLast/dismiss, per-theme override file
  ~/.config/omarchy/current/theme/notifications.json honoring
  borderColor/backgroundColor/textColor/countdownColor.
- components/NotificationCard.qml: theme-driven card (Color.foreground/
  background/border tokens from Commons/Color.qml), 32x32 icon slot,
  Nerd Font glyph fallback via omarchy-glyph hint, hero image strip
  for screenshot/image-path notifications, hover-pause progress bar,
  uses bar.fontFamily so all surfaces share one font.

Filtering and DND:
- transient hint and CLI-style senders (app_name in notify-send /
  omarchy-action) bypass history but still pop.
- DND only allows omarchy-action toasts and notify-send -u critical
  through; real-app urgency=critical (Discord, Slack, Vesktop) is
  silenced and lands in pending instead.
- Pending vs past split surfaced via tabs in the bar widget popup;
  past tab is auto-pruned at the 15-minute mark.
- Click-to-jump: notifications without a libnotify default action focus
  the matching Hyprland window via class lookup.

Shell host:
- shell.qml: generic first-party service loader (mirrors the existing
  noctalia-compat path) and an alias for the bar so plugins can read
  barSize / barHidden / position for anchoring.
- Commons/Color.qml: parses the theme's hyprland.conf for
  $activeBorderColor so notifications match Hyprland window borders;
  picks the explicit accent= key over the color4= alias.

Bar widget rebase (plugins/bar/widgets/notificationCenter.qml):
- Drops the chunk-1 stub server, binds count/dnd state to the service,
  hosts the history popup via PopupCard so it drops down from the
  notification glyph the same way Quick Settings does.
- Pending/Past tabs, dismiss-individual close X, mark-all-as-seen and
  clear-recent action buttons, theme-driven palette.

Quick Settings rework (plugins/bar/widgets/controlCenter.qml):
- DND tile binds directly to service.doNotDisturb for instant feedback.
- Drops the volume slider (already in audioPanel) and the no-op Theme
  tile; adds a Bluetooth toggle bound to Quickshell.Bluetooth.
- Bigger 44x44 wallet was scaled back to 32x32 for tighter rows.

Notification scripts (bin/omarchy-*):
- omarchy-notification-send: passes glyph as a custom hint instead of
  prepending to the summary; adds -a omarchy-action and -u urgency
  automatically; supports -e/--transient passthrough.
- User-action toasts in the capture / toggle / hyprland / default-*
  scripts and bindings/utilities.lua now tag themselves
  -a omarchy-action so DND treats them as intent-based bypass.
- omarchy-toggle-notification-silencing, omarchy-notification-dismiss,
  default/waybar/indicators/notification-silencing.sh, and the Hyprland
  comma-keybinds all route through omarchy-shell-ipc notifications.
- omarchy-capture-screenshot / -screenrecording set the image-path
  hint properly so the hero-image rendering kicks in.

Mako removal (migrations/1778743515.sh):
- pkill -x mako, systemctl --user stop mako.service, pacman -Rns mako
  (uninstalling deletes /usr/lib/systemd/user/mako.service so D-Bus
  activation can't respawn it). Removes ~/.config/mako/ and the legacy
  toggle file. Restarts quickshell so it claims the bus name.
- Drops mako from install/omarchy-base.packages, autostart.lua,
  install/config/theme.sh + toggles.sh, default/themed/mako.ini.tpl,
  default/mako/, the omarchy-menu Mako restart row, bin/omarchy
  GROUP_DESCRIPTIONS, the settings panel catalogue, and the
  default/omarchy-skill paths table.
- Removed scripts: bin/omarchy-restart-mako,
  bin/omarchy-style-corners-mako.
- bin/omarchy-style-corners summary updated; corner radius for the
  notification card reads ~/.local/state/omarchy/toggles/quickshell-menu.json
  alongside the rest of the shell.

default/omarchy/omarchy-menu.jsonc

@@ -77,7 +77,7 @@
   "trigger.toggle.screensaver": {"icon":"󱄄","label":"Screensaver","action":"omarchy-toggle-screensaver"},
   "trigger.toggle.nightlight": {"icon":"󰔎","label":"Nightlight","keywords":"night light hyprsunset","action":"omarchy-toggle-nightlight"},
   "trigger.toggle.idle-lock": {"icon":"󱫖","label":"Idle Lock","keywords":"hypridle","action":"omarchy-toggle-idle"},
-  "trigger.toggle.notifications": {"icon":"󰂛","label":"Notifications","keywords":"mako silence","action":"omarchy-toggle-notification-silencing"},
+  "trigger.toggle.notifications": {"icon":"󰂛","label":"Notifications","keywords":"silence dnd","action":"omarchy-toggle-notification-silencing"},
   "trigger.toggle.top-bar": {"icon":"󰍜","label":"Bar","keywords":"top bar quickshell","action":"omarchy-toggle-bar"},
   "trigger.toggle.workspace-layout": {"icon":"󱂬","label":"Workspace Layout","action":"omarchy-hyprland-workspace-layout-toggle"},
   "trigger.toggle.window-gaps": {"icon":"","label":"Window Gaps","action":"omarchy-hyprland-window-gaps-toggle"},
@@ -311,7 +311,6 @@
   "update.channel.dev": {"icon":"🔴","label":"Dev","keywords":"development","action":"present_terminal 'omarchy-channel-set dev'"},
   "update.process.hypridle": {"icon":"","label":"Hypridle","keywords":"restart","action":"omarchy-restart-hypridle"},
   "update.process.hyprsunset": {"icon":"","label":"Hyprsunset","keywords":"restart","action":"omarchy-restart-hyprsunset"},
-  "update.process.mako": {"icon":"󰎟","label":"Mako","keywords":"restart notifications","action":"omarchy-restart-mako"},
   "update.process.swayosd": {"icon":"","label":"Swayosd","keywords":"restart","action":"omarchy-restart-swayosd"},
   "update.process.walker": {"icon":"󰌧","label":"Walker","keywords":"restart launcher","action":"omarchy-restart-walker"},
   "update.process.quickshell": {"icon":"󰍜","label":"Quickshell","keywords":"restart bar shell","action":"omarchy-restart-quickshell"},