feat(polybar): add power module to polybar configuration

Add a new power module to the polybar configuration that displays a power icon and triggers the fws-powermenu command on click. The module is styled with red foreground color and integrated into the modules-right bar.

configs/releng/airootfs/usr/local/share/fws/polybar-config.ini

@@ -37,7 +37,7 @@ font-1 = Symbols Nerd Font:size=12;3
 font-2 = Noto Sans:weight=bold:size=10;2
 modules-left = i3 xwindow
 modules-center = date
-modules-right = updates keyhelp backlight pulseaudio network cpu memory tray
+modules-right = updates keyhelp backlight pulseaudio network cpu memory tray power
 enable-ipc = true
 wm-restack = i3
 
@@ -152,6 +152,15 @@ format-background = ${colors.surface0}
 format-foreground = ${colors.maroon}
 format-padding = 2
 
+[module/power]
+type = custom/text
+content = 󰐥
+content-foreground = ${colors.red}
+content-background = ${colors.surface0}
+content-padding = 2
+content-font = 2
+click-left = fws-powermenu
+
 [module/tray]
 type = internal/tray
 format = <tray>