feat: Add Timo Knuth author metadata to all 22 blog posts for AEO/GEO optimization

- Add authorName and authorTitle fields to all 22 blog posts
- Update BlogPost type definition to include optional authorName and authorTitle fields
- Set author to 'Timo Knuth' with title 'QR Code & Marketing Expert' across all posts
- Foundation for schema markup and AI search optimization (AEO/GEO)

Co-Authored-By: Timo Knuth <noreply@qrmaster.net>

src/lib/types.ts

@@ -32,6 +32,8 @@ export type BlogPost = {
     publishDate?: string;  // User-provided alternate date field
     updatedAt?: string;    // User-provided alternate date field
     authorSlug: string;
+    authorName?: string;   // Full name for AEO/GEO optimization
+    authorTitle?: string;  // Job title/expertise for schema markup
 
     // SEO
     keywords?: string[];