Update temperature and battery icons to use md icons

nixos/home-manager/env/config/waybar/config

@@ -90,7 +90,7 @@
         "critical-threshold": 80,
         // "format-critical": "{temperatureC}°C {icon}",
         "format": "{temperatureC}°C {icon}",
-        "format-icons": ["", "", ""]
+        "format-icons": ["󱃃", "󰔏", "󱃂"]
     },
     "backlight": {
         // "device": "acpi_video1",
@@ -104,12 +104,10 @@
             "critical": 15
         },
         "format": "{capacity}% {icon}",
-        "format-charging": "{capacity}% ",
-        "format-plugged": "{capacity}% ",
+        "format-charging": "{capacity}% 󰂄",
+        "format-plugged": "{capacity}% 󰚥",
         "format-alt": "{time} {icon}",
-        // "format-good": "", // An empty format will hide the module
-        // "format-full": "",
-        "format-icons": ["", "", "", "", ""]
+        "format-icons": ["󱃍", "󰁺", "󰁻", "󰁼", "󰁽", "󰁾", "󰁿", "󰂀", "󰂁", "󰂂", "󰁹"]
     },
     "battery#bat2": {
         "bat": "BAT2"