feat: switch from PaperMod to Congo theme

- Warm avocado color scheme, light mode default — friendly for families
- Congo language configs in config/_default/languages.{en,de}.toml
- Renamed extend partials to Congo convention (hyphens)
- Override warnings.html for Hugo 0.159 compatibility (.Author removed)
- All shortcodes and custom partials preserved

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

hugo.toml

@@ -1,6 +1,6 @@
 baseURL = "https://internetforkids.ong/"
 title = "Internet for Kids"
-theme = "PaperMod"
+theme = "congo"
 
 defaultContentLanguage = "en"
 defaultContentLanguageInSubdir = true
@@ -23,80 +23,10 @@ enableRobotsTXT = true
   section = ["HTML", "RSS"]
 
 [params]
-  description = "Expert insights on child protection laws, online safety, and digital family protection worldwide."
-  favicon = "/favicon.ico"
-  author = "Agiliton"
-  ShowReadingTime = true
-  ShowShareButtons = true
-  ShowPostNavLinks = true
-  ShowBreadCrumbs = true
-  ShowCodeCopyButtons = true
-  defaultTheme = "auto"
   # Rybbit Analytics
   rybbit_site_id = "a0ab05916d6c"
   rybbit_url = "https://analytics.clicksports.de"
 
-  [params.homeInfoParams]
-    Title = "Protecting Kids Online"
-    Content = "Expert insights on child protection laws, online safety, and digital family protection worldwide."
-
-  [[params.socialIcons]]
-    name = "rss"
-    url = "/index.xml"
-
-[languages]
-  [languages.en]
-    languageName = "English"
-    weight = 1
-    title = "Internet for Kids"
-    contentDir = "content/en"
-    [languages.en.params]
-      description = "Expert insights on child protection laws, online safety, and digital family protection worldwide."
-    [languages.en.params.homeInfoParams]
-      Title = "Protecting Kids Online"
-      Content = "Expert insights on child protection laws, online safety, and digital family protection worldwide."
-    [[languages.en.menus.main]]
-      identifier = "about"
-      name = "About"
-      url = "/about/"
-      weight = 2
-    [[languages.en.menus.main]]
-      identifier = "tags"
-      name = "Topics"
-      url = "/tags/"
-      weight = 3
-    [[languages.en.menus.main]]
-      identifier = "search"
-      name = "Search"
-      url = "/search/"
-      weight = 4
-
-  [languages.de]
-    languageName = "Deutsch"
-    weight = 2
-    title = "Internet für Kinder"
-    contentDir = "content/de"
-    [languages.de.params]
-      description = "Experteneinblicke zu Kinderschutzgesetzen, Online-Sicherheit und digitalem Familienschutz weltweit."
-    [languages.de.params.homeInfoParams]
-      Title = "Kinder online schützen"
-      Content = "Experteneinblicke zu Kinderschutzgesetzen, Online-Sicherheit und digitalem Familienschutz weltweit."
-    [[languages.de.menus.main]]
-      identifier = "about"
-      name = "Über uns"
-      url = "/about/"
-      weight = 2
-    [[languages.de.menus.main]]
-      identifier = "tags"
-      name = "Themen"
-      url = "/tags/"
-      weight = 3
-    [[languages.de.menus.main]]
-      identifier = "search"
-      name = "Suche"
-      url = "/search/"
-      weight = 4
-
 [taxonomies]
   tag = "tags"
   category = "categories"