add light/dark switch, change color schema

documentation/mkdocs.yml

+# Copyright (c) 2002-2024 CERN for the benefit of the ATLAS collaboration
+
+# Project information
 site_name: GeoModel - A Detector Description Toolkit for HEP
-site_description: GeoModel - An experiment-agnostic Detector Description Toolkit for HEP
-site_author: ATLAS Collaboration & Contributors
-site_url: https://cern.ch/geomodel/home
+site_author: GeoModel Core Team (ATLAS Collaboration)
+site_url: https://geomodel.web.cern.ch/home/
+# site_author: geomodel-developers@cern.ch
+
+site_description: GeoModel - An experiment-agnostic Detector Description Toolkit for High Energy Physics experiments
+#site_description: >-
+#  Write your documentation in Markdown and create a professional static site in
+#  minutes – searchable, customizable, in 60+ languages, for all devices
+
+# Repository
 repo_name: GeoModel
 repo_url: https://gitlab.cern.ch/GeoModelDev/GeoModel
-site_author: geomodel-developers@cern.ch
+
+# Copyright
+copyright: Copyright © 2016 - 2024 Martin Donath
+
+
+
+# ==================
+# Configuration
+# ==================
 
 theme:
     name: material
+    palette: 
+    # Palette toggle for light mode
+    - scheme: default
+      primary: purple #pink #yellow #indigo
+      toggle:
+        icon: material/weather-sunny 
+        name: Switch to dark mode
+
+    # Palette toggle for dark mode
+    - scheme: slate
+      primary: purple #pink #yellow #indigo
+      toggle:
+        icon: material/weather-night
+        name: Switch to light mode
+      
+
+    
+
+
 
+# Extensions
+markdown_extensions:
+    - smarty                # to use 'SmartyPants' typography extensions as '---' for em-dashes
+    - admonition            # to use notes, warnings, tips, ...
+    - footnotes             # to set footnotes
+    - pymdownx.superfences  
+    - pymdownx.superfences: # to use code blocks nested under lists items
+        # make exceptions to highlighting of code:
+        custom_fences:
+          - name: mermaid
+            class: mermaid
+            format: !!python/name:mermaid2.fence_mermaid
+    - toc:
+        permalink: true
+    - markdown_include.include:
+        base_path: docs
+    - pymdownx.arithmatex:  # to use LaTeX syntax in Markdown files
+        generic: true
+    #- markdown.extensions.attr_list # to use custom css settings, e.g. {: .center}. Not used now
+    - attr_list  # for icons&emojis and the HTML grid on the front page
+    - md_in_html # for the HTML grid on the front page
+    - pymdownx.emoji: 
+        emoji_index: !!python/name:material.extensions.emoji.twemoji
+        emoji_generator: !!python/name:material.extensions.emoji.to_svg
+
+
+# Plugins
+plugins:
+  - search
+  - macros:
+        module_name: imgutils
+        verbose: true # enables debug through the 'chatter' method
+  - mermaid2 # for diagrams
+  #- git-revision-date #TODO: the mkdocs docker image apparently lacks the git exec, so this cannot be used. Update the image!
+
+
+# Additional configuration
+extra_css:
+    - material_nested_lists_rendering.css
+extra_javascript:
+  - javascripts/config.js
+  - https://polyfill.io/v3/polyfill.min.js?features=es6
+  - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
+  - https://unpkg.com/mermaid/dist/mermaid.min.js
+
+
+
+# ========================
+# Page tree
+# ========================
 nav:
     - Home: 'index.md'
     - 'Install Libraries & Tools': 'start/install.md'
@@ -65,40 +152,6 @@ nav:
       #  - 'Internal': 'papers/internal.md'
     - Team & History: 'about/team.md'
     - Contacts: 'about/contacts.md'
+    - License: 'about/license.md'
 
-extra_css:
-    - material_nested_lists_rendering.css
-
-markdown_extensions:
-    - smarty                # to use 'SmartyPants' typography extensions as '---' for em-dashes
-    - admonition            # to use notes, warnings, tips, ...
-    - footnotes             # to set footnotes
-    - pymdownx.superfences  
-    - pymdownx.superfences: # to use code blocks nested under lists items
-        # make exceptions to highlighting of code:
-        custom_fences:
-          - name: mermaid
-            class: mermaid
-            format: !!python/name:mermaid2.fence_mermaid
-    - toc:
-        permalink: true
-    - markdown_include.include:
-        base_path: docs
-    - pymdownx.arithmatex:  # to use LaTeX syntax in Markdown files
-        generic: true
-    #- markdown.extensions.attr_list # to use custom css settings, e.g. {: .center}. Not used now
-
-plugins:
-  - search
-  - macros:
-        module_name: imgutils
-        verbose: true # enables debug through the 'chatter' method
-  - mermaid2 # for diagrams
-  #- git-revision-date #TODO: the mkdocs docker image apparently lacks the git exec, so this cannot be used. Update the image!
-
-extra_javascript:
-  - javascripts/config.js
-  - https://polyfill.io/v3/polyfill.min.js?features=es6
-  - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
-  - https://unpkg.com/mermaid/dist/mermaid.min.js