feat: add local Impressum + Datenschutz pages, no cookies/external fonts

- Imprint and Privacy Policy pages in EN/DE with translationKey
- Footer links now point to local pages instead of agiliton.eu
- Privacy policy documents: no cookies, no external fonts, Rybbit self-hosted

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

config/_default/languages.de.toml

@@ -40,15 +40,11 @@ contentDir = "content/de"
 [[menus.footer]]
   identifier = "impressum"
   name = "Impressum"
-  url = "https://www.agiliton.eu/impressum"
+  url = "/impressum/"
   weight = 1
-  [menus.footer.params]
-    external = true
 
 [[menus.footer]]
   identifier = "privacy"
   name = "Datenschutzerklärung"
-  url = "https://www.agiliton.eu/datenschutz"
+  url = "/datenschutz/"
   weight = 2
-  [menus.footer.params]
-    external = true

config/_default/languages.en.toml

@@ -40,15 +40,11 @@ contentDir = "content/en"
 [[menus.footer]]
   identifier = "impressum"
   name = "Imprint"
-  url = "https://www.agiliton.eu/impressum"
+  url = "/imprint/"
   weight = 1
-  [menus.footer.params]
-    external = true
 
 [[menus.footer]]
   identifier = "privacy"
   name = "Privacy Policy"
-  url = "https://www.agiliton.eu/datenschutz"
+  url = "/privacy/"
   weight = 2
-  [menus.footer.params]
-    external = true