Show battery power draw from sensors in waybar

Replace the built-in battery module with a custom/battery script that
combines sysfs capacity/status with the power1 reading from `sensors`,
displaying it as "85% (5.4W)" next to the icon.

config/waybar/config.jsonc

@@ -5,7 +5,7 @@
   "spacing": 6,
   "modules-left": ["sway/workspaces", "sway/mode"],
   "modules-center": ["clock"],
-  "modules-right": ["cpu", "memory", "custom/network", "pulseaudio", "backlight", "battery", "tray", "custom/power"],
+  "modules-right": ["cpu", "memory", "custom/network", "pulseaudio", "backlight", "custom/battery", "tray", "custom/power"],
   "sway/workspaces": {
     "disable-scroll": false,
     "all-outputs": false,
@@ -17,7 +17,7 @@
   "custom/network": { "exec": "~/.config/waybar/scripts/network-cycle.sh", "return-type": "json", "interval": 300, "signal": 8, "on-click": "~/.config/waybar/scripts/network-cycle.sh next", "on-click-right": "~/.config/waybar/scripts/network-cycle.sh copy" },
   "pulseaudio": { "format": "{icon} {volume}%", "format-muted": "󰝟 muted", "format-icons": ["󰕿", "󰖀", "󰕾"], "tooltip-format": "{desc}", "on-click": "wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle", "on-click-right": "~/.config/waybar/scripts/audio-output-cycle.sh" },
   "backlight": { "format": "󰃠 {percent}%" },
-  "battery": { "states": { "warning": 30, "critical": 15 }, "format": "{icon} {capacity}%", "format-charging": "󰂄 {capacity}%", "format-icons": ["󰁺", "󰁼", "󰁾", "󰂀", "󰁹"] },
+  "custom/battery": { "exec": "~/.config/waybar/scripts/battery-power.sh", "return-type": "json", "interval": 10, "tooltip": true },
   "tray": { "spacing": 8 },
   "custom/power": {
     "format": "󰐥",