Inject Google Search Console verification meta tag site-wide

Uses mkdocs-material's custom_dir theme override to extend base.html
and add the meta tag to every page's <head>, so verification works
regardless of which URL Google's bot lands on first.

Author: bilouro

mkdocs.yml

@@ -12,6 +12,7 @@ edit_uri: edit/main/docs/
 
 theme:
   name: material
+  custom_dir: overrides
   language: en
   palette:
     - media: "(prefers-color-scheme: light)"

overrides/main.html

@@ -0,0 +1,5 @@
+{% extends "base.html" %}
+
+{% block extrahead %}
+  <meta name="google-site-verification" content="m0lOWoBdqTXAryBbmQmS-V0ji2meioyYDvMMI_whLaE" />
+{% endblock %}