Customize waybar with Catppuccin Latte theme and niri modules

- Replace sway modules with niri/workspaces, niri/window, niri/language
- Remove battery, backlight, mpd (desktop machine)
- Add custom modules: GPU (nvidia-smi), weather (wttr.in), mail (Thunderbird)
- Add disk, privacy modules
- Catppuccin Latte colors with Mocha dark background
- Wi-Fi signal level icon, bold 15px font
- Scripts for GPU, weather, and mail monitoring

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

bazzite/waybar/scripts/weather.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+weather=$(curl -s "wttr.in/?format=%c%t" 2>/dev/null)
+if [ -z "$weather" ] || echo "$weather" | grep -q "Unknown"; then
+    echo '{"text": "N/A", "tooltip": "Weather unavailable"}'
+    exit 0
+fi
+tooltip=$(curl -s "wttr.in/?format=%l:+%C+%t+%w+%h" 2>/dev/null)
+echo "{\"text\": \"${weather}\", \"tooltip\": \"${tooltip}\"}"