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/za.svg

@@ -14,4 +14,4 @@
       <path fill="#fff" d="M23 0h59.2l253.6 170.7H696V204H324.3zm0 512.1h59.2l253.6-170.6H696v-33.2H324.3L23 512z"/>
     </g>
   </g>
-</svg>
+</svg>