feat(file-handler): improve metadata display and XMP parsing

- Add new formatIsoDate helper for human-readable dates
- Enhance PDF info dictionary display with better null handling
- Implement structured XMP metadata parsing with formatted output
- Improve error handling for metadata processing

docker-compose.yml

@@ -1,9 +1,9 @@
 services:
   bentopdf:
-  # simple mode - bentopdf/bentopdf-simple:latest
-  # default mode - bentopdf/bentopdf:latest
+    # simple mode - bentopdf/bentopdf-simple:latest
+    # default mode - bentopdf/bentopdf:latest
     image: bentopdf/bentopdf-simple:latest
     container_name: bentopdf
     restart: unless-stopped
     ports:
-      - '3000:80'
+      - '3000:80'