feat: add a more practical example course

exampleSite/config/_default/menus.toml

@@ -5,7 +5,7 @@
 
 [[main]]
   name = "Demo"
-  url = "#hero"
+  url = "#about"
   weight = 10
 
 [[main]]

exampleSite/config/_default/params.toml

@@ -56,8 +56,8 @@ description = ""
 
 # Enable source code highlighting? true/false
 # Documentation: https://wowchemy.com/docs/writing-markdown-latex/#highlighting-options
-highlight = false
-highlight_languages = ["r", "latex"]  # Add support for highlighting additional languages
+highlight = true
+highlight_languages = ["r", "python", "latex"]  # Add support for highlighting additional languages
 # highlight_style = "github"  # For supported styles, see https://cdnjs.com/libraries/highlight.js/
 
 # Enable LaTeX math rendering? true/false