docs: Add ability to toggle dark-mode

Author: kazysgurskas

mkdocs.yml

@@ -5,7 +5,18 @@ strict: true
 theme:
   name: material
   palette:
+  - media: '(prefers-color-scheme: light)'
     primary: teal
+    scheme: default
+    toggle:
+      icon: material/brightness-7
+      name: Switch to dark mode
+  - media: '(prefers-color-scheme: dark)'
+    primary: teal
+    scheme: slate
+    toggle:
+      icon: material/brightness-4
+      name: Switch to light mode
   font:
     text: 'Work Sans'
   logo: 'assets/logo.png'