feat(docs): add toggle for light/dark mode support

mkdocs.yml

@@ -21,8 +21,28 @@ theme:
     logo: 'material/cloud-outline'
   favicon: 'img/logo-notext.svg'
   palette:
-    primary: 'teal'
-    accent: 'green'
+    # Palette toggle for automatic mode
+    - media: "(prefers-color-scheme)"
+      toggle:
+        icon: material/brightness-auto
+        name: Switch to light mode
+
+    # Palette toggle for light mode
+    - media: "(prefers-color-scheme: light)"
+      scheme: default
+      primary: 'teal'
+      accent: 'green'
+      toggle:
+        icon: material/brightness-7
+        name: Switch to dark mode
+
+    # Palette toggle for dark mode
+    - media: "(prefers-color-scheme: dark)"
+      scheme: slate
+      toggle:
+        icon: material/brightness-4
+        name: Match OS theme (Automatic)
+
 plugins:
   - search
   - macros: