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/kr.svg

@@ -21,4 +21,4 @@
       <path stroke="#fff" d="M0-23.5v3M0 17v3.5m0 3v3"/>
     </g>
   </g>
-</svg>
+</svg>