Clean up obsolete resources and update documentation

- Remove all DynamoDB-related scripts and data files
- Remove AWS SDK dependencies from scripts
- Update environment files to remove DynamoDB/Lambda references
- Update PROJECT_STRUCTURE.md to reflect current architecture
- Clean up Terraform variables and examples
- Add PLA Matte to special pricing (3999 RSD / 3499 RSD refill)
- Make all table columns sortable
- Remove old Terraform state backups
- Remove temporary data import files

terraform/terraform.tfvars.example

@@ -1,12 +1,11 @@
 # Copy this file to terraform.tfvars and fill in your values
 
-github_repository  = "https://github.com/yourusername/filamenteka"
-github_token       = "ghp_your_github_token_here"
+# GitHub repository for Amplify
+github_repository = "https://github.com/yourusername/filamenteka"
+github_token      = "ghp_your_github_token_here"
 
-# Admin Authentication
-jwt_secret          = "your-secret-key-at-least-32-characters-long"
-admin_username      = "admin"
-admin_password_hash = "bcrypt-hash-generated-by-generate-password-hash.js"
+# Domain configuration
+domain_name = "filamenteka.yourdomain.com"
 
-# Optional: Custom domain
-# domain_name = "filamenteka.yourdomain.com"
+# Cloudflare configuration (optional)
+cloudflare_api_token = "your-cloudflare-api-token"