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/dj.svg

@@ -10,4 +10,4 @@
     <path fill="#fffefe" d="m-40 0 382.7 255.7L-40 511z"/>
     <path fill="red" d="M119.8 292 89 270l-30.7 22.4L69.7 256l-30.6-22.5 37.9-.3 11.7-36.3 12 36.2h37.9l-30.5 22.7 11.7 36.4z"/>
   </g>
-</svg>
+</svg>