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/is.svg

@@ -9,4 +9,4 @@
     <path fill="#fff" d="M0 186.7h186.7V0h106.6v186.7h373.4v106.6H293.3V480H186.7V293.3H0z"/>
     <path fill="#d72828" d="M0 213.3h213.3V0h53.4v213.3h400v53.4h-400V480h-53.4V266.7H0z"/>
   </g>
-</svg>
+</svg>