Update the pages

lib/web/site/model_site_section.v

@@ -10,8 +10,9 @@ pub mut:
 
 pub struct Section {
 pub mut:
-	name    string
-	position int
-	path     string
-	label    string
+	name        string
+	position    int
+	path        string
+	label       string
+	description string
 }

lib/web/site/play_page.v

@@ -45,6 +45,7 @@ fn play_pages(mut plbook PlayBook, mut site Site) ! {
 			}
 			section.label = p.get_default('label', texttools.name_fix_snake_to_pascal(section.name))!
 			section.path = p.get_default('path', texttools.name_fix(section.label))!
+			section.description = p.get_default('description', '')!
 
 			site.sections << section
 			action.done = true // Mark the action as done