docs: add clan options search page

This provides a simpler and more intuitive search over a flat list of possible options.

Styling still to be improved

docs/overrides/options.html

@@ -0,0 +1,14 @@
+{% extends "base.html" %} {% block extrahead %}
+<style>
+  .md-main__inner {
+    max-width: 100% !important;
+  }
+  .md-content {
+    max-width: 100% !important;
+  }
+  .md-main__inner {
+    margin-top: 0 !important;
+  }
+</style>
+{% endblock %} {% block site_nav %}{% endblock %} {% block content %} {{
+page.content }} {% endblock %}