feat: adopt @unom/ui + add Projects section to the landing page

- Pull in @unom/ui (0.8.16) + @unom/style + peers; bump @unom/cms to 0.3.0.
- globals.css now provides the full semantic-token contract @unom/ui consumes
  (primary/accent/background/ring/radius-card/…), expressed with unom's violet
  brand + Inter/Ubuntu.
- Section wraps @unom/ui's Section (in-view animation orchestrator); PostCard,
  LatestPosts, and the hero use AnimatedCard/AnimatedText/AnimatedButton/Heading.
- lib/cms.ts moves to the multi-tenant model (tenant=unom), header/footer as
  per-tenant collections, + findProjects().
- New Projects section lists this tenant's projects on the landing page
  (soft-fails to hidden when empty). Starts with punktfunk.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

messages/de.json

@@ -6,6 +6,9 @@
 
 	"home_title": "unom - Kreative Webentwicklung",
 
+	"projects_heading": "Projekte",
+	"projects_intro": "Eigene Produkte und Marken aus dem Hause unom.",
+
 	"blog_title": "Blog",
 	"blog_meta_description": "Notizen, Gedanken und Tutorials aus der Werkstatt von unom.",
 	"blog_empty": "Noch keine Beiträge.",

messages/en.json

@@ -6,6 +6,9 @@
 
 	"home_title": "unom - Creative web development",
 
+	"projects_heading": "Projects",
+	"projects_intro": "Our own products and brands, built in-house at unom.",
+
 	"blog_title": "Blog",
 	"blog_meta_description": "Notes, thoughts, and tutorials from the unom workshop.",
 	"blog_empty": "No posts yet.",