docs: add some search features to mkdocs config (#704)

Enables some search features for the mkdocs config.

docs/mkdocs.yml

@@ -21,6 +21,8 @@ theme:
     - navigation.instant
     - navigation.sections
     - toc.integrate
+    - search.suggest
+    - search.highlight
   palette:
     # Light mode
     - media: "(prefers-color-scheme: light)"
@@ -109,6 +111,10 @@ markdown_extensions:
   - pymdownx.tabbed:
       alternate_style: true
 
+plugins:
+  - tags
+  - search
+
 extra:
   # Versioning
   version: