Add Flags Assets and Update Configuration

- Introduced multiple SVG flag assets to the project, enhancing the visual representation of country flags.
- Updated the configuration file to include a new path for the flags assets, ensuring proper access and organization.
- Modified the main application to accommodate the new flags path, improving the overall asset management in the application.

cmd/web/config.yaml

@@ -47,4 +47,7 @@ logging:
 
 rate_limiting:
   requests_per_minute: 100
-  burst: 20 
+  burst: 20 
+
+assets:
+  flags_path: "./assets/flags"