doc: Update website appearance

Author: nathaneastwood

_pkgdown.yml

@@ -1,3 +1,10 @@
+template:
+  bootstrap: 5
+  theme: github-light
+  bslib:
+    primary: "#EF60A3"
+    code_font: {google: "Fira Code"}
+
 reference:
 - title: Caching
   contents:
@@ -42,7 +49,6 @@ reference:
   - drop_temp_view
 
 navbar:
-  type: inverse
   left:
     - icon: fa-home
       href: index.html