fix(docs): make the docs respect light/dark mode (#334)

Closes #333

I'm very bad at design so I just picked colors that looked reasonable
enough to me. Hopefully this will be enough to get us to the next stage!

Signed-off-by: Xe Iaso <me@xeiaso.net>

docs/docusaurus.config.ts

@@ -70,6 +70,9 @@ const config: Config = {
   ],
 
   themeConfig: {
+    colorMode: {
+      respectPrefersColorScheme: true,
+    },
     // Replace with your project's social card
     image: 'img/docusaurus-social-card.jpg',
     navbar: {