add & update theme dependencies

mkdocs.yml

@@ -26,20 +26,28 @@ theme:
 copyright: Copyleft 2023 Co-op Cloud
 
 markdown_extensions:
-  - meta
   - admonition
+  - attr_list
   - codehilite:
       guess_lang: false
+  - def_list
+  - footnotes
+  - md_in_html
+  - meta
   - toc:
       permalink: true
-  - attr_list
-  - pymdownx.tabbed
-  - pymdownx.superfences
-  - pymdownx.tilde
-  - pymdownx.magiclink
+  - pymdownx.betterem:
+      smart_enable: all
+  - pymdownx.details
   - pymdownx.emoji:
-      emoji_index: !!python/name:materialx.emoji.twemoji
-      emoji_generator: !!python/name:materialx.emoji.to_svg
+      emoji_generator: !!python/name:material.extensions.emoji.to_svg
+      emoji_index: !!python/name:material.extensions.emoji.twemoji
+  - pymdownx.magiclink
+  - pymdownx.mark
+  - pymdownx.smartsymbols
+  - pymdownx.superfences
+  - pymdownx.tabbed
+  - pymdownx.tilde
 
 nav:
   - "Introduction":