Merge pull request #263 from datajoint/restyle/brand-identity

Restyle: align the docs with the DataJoint visual identity (palette, typography, logo)

Author: dimitri-yatsenko

src/.overrides/.icons/main/company-logo.svg

@@ -15,6 +15,9 @@
 {% endblock %}
 
 {% block extrahead %}
+  <!-- Roboto for headings (body uses Roboto Slab, code uses Source Code Pro via theme.font) -->
+  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+  <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap">
 	<script
 		src="https://www.datadoghq-browser-agent.com/us1/v4/datadog-rum.js"
 		type="text/javascript">