Add MaterialX for MkDocs and update themes (#3)

Co-authored-by: Oleh Prypin <oleh@pryp.in>

Author: Andre601

projects.yaml

@@ -267,6 +267,16 @@ projects:
   pypi_id: mkdocs-shadcn
   labels: [theme, plugin]
   category: theming
+- name: MaterialX for MkDocs
+  mkdocs_theme: materialx
+  mkdocs_plugin: [materialx/blog, materialx/group, materialx/info, materialx/meta, materialx/offline, materialx/optimize, materialx/privacy, materialx/search, materialx/social, materialx/tags]
+  extra_dependencies:
+    plugins.social: mkdocs-materialx[imaging]
+    plugins.optimize: mkdocs-material[imaging]
+  github_id: jaywhj/mkdocs-materialx
+  pypi_id: mkdocs-materialx
+  labels: [theme, plugin]
+  category: theming
 - name: automacdoc
   github_id: AlexandreKempf/automacdoc
   pypi_id: automacdoc