Add dismissible announce bar to docs site (#3004)

* Add dismissible announce bar to docs site

* Update announce bar text

* Update announce bar wording

Author: koxudaxi

overrides/main.html

@@ -0,0 +1,9 @@
+{% extends "base.html" %}
+
+{% block announce %}
+  📣 💼 Maintainer update: I'm open to opportunities.
+  <a href="https://koxudaxi.dev/?utm_source=dm-docs&utm_medium=announce&utm_campaign=open_to_work"
+     target="_blank" rel="noopener">
+    🔗 koxudaxi.dev
+  </a>
+{% endblock %}

zensical.toml

@@ -70,6 +70,7 @@ nav = [
 ]
 
 [project.theme]
+custom_dir = "overrides"
 features = [
   "content.code.copy",
   "content.code.annotate",
@@ -80,7 +81,8 @@ features = [
   "navigation.expand",
   "search.highlight",
   "search.share",
-  "toc.follow"
+  "toc.follow",
+  "announce.dismiss"
 ]
 
 [project.theme.icon]