Clean up SVG files and update logos

- Removed unnecessary XML and DOCTYPE declarations from SVG files.
- Eliminated comments within SVG files for cleaner output.
- Trimmed leading and trailing whitespace from SVG content.
- Ensured all SVG files end with a newline character.
- Updated multiple logo SVG files including WireGuard, Wise, WOG, Yahoo, and others to conform to the new standards.
- Enhanced the update-data.js script to automate the cleanup process for SVG files.

public/images/flags/sn.svg

@@ -5,4 +5,4 @@
     <path fill="#bc0000" d="M426.6 0H640v480H426.6z"/>
   </g>
   <path fill="#0b7226" d="M342 218.8h71.8l-56.6 43.6 20.7 69.3-56.6-43.6-56.6 41.6 20.7-67.3-56.6-43.6h69.8l22.7-71.3z"/>
-</svg>
+</svg>