Add SketchyBar integration to aerospace with bottom bar positioning

Integrate SketchyBar status bar with aerospace window manager, providing
a native macOS status bar replacement with workspace indicators and system
monitoring. Key features:

- Add sketchybar.enable option to aerospace module
- Install sketchybar package and fonts conditionally
- Create main sketchybarrc with i3/sway color theme
- Position bar at bottom with 40px bottom gap
- Implement workspace indicators with dynamic visibility:
  - Hide empty workspaces
  - Show focused workspace with blue highlight
  - Show non-empty workspaces with inactive styling
  - Use centered icons with fixed 32px width
- Add system monitoring plugins: CPU, memory, disk, battery, volume, clock
- Integrate menu bar extras (Bluetooth, WiFi) as aliases
- Configure aerospace to trigger workspace change events
- Hide native macOS menu bar when SketchyBar enabled
- Set up launchd agent for auto-start
- Use SF Mono Regular 13.0 font matching waybar aesthetic

home/home-darwin-work.nix

@@ -107,6 +107,7 @@
     aerospace = {
       enable = true;
       leader = "cmd";
+      sketchybar.enable = true;
       # Optional: Add per-machine userSettings overrides
       # userSettings = {
       #   mode.main.binding."${leader}-custom" = "custom-command";