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/si.svg

@@ -15,4 +15,4 @@
     <path fill="#ffdf00" d="m169.4 83.9 1.6 3.7 7 1-4.6 2.7 4.4 2.9-6.3 1-2 3.4-2-3.5-6-.8 4-3-4.2-2.7 6.6-1zm-33 0 1.6 3.7 7 .9-4.5 2.7 4.3 2.9-6.3 1-2 3.4-2-3.4-6-.9 4-3-4.2-2.7 6.7-1z"/>
     <path fill="#0000bf" d="M199.7 203h-7.4l-7-.5-8.3-4h-9.4l-8.1 4-6.5.6-6.4-.6-8.1-4H129l-8.4 4-6.9.6-7.6-.1-3.6-6.2.1-.2 11.2 1.9 6.9-.5 8.3-4.1h9.4l8.2 4 6.4.6 6.5-.6 8.1-4h9.4l8.4 4 6.9.6 10.8-2 .2.4zm-86.4 9.5 7.4-.5 8.3-4h9.4l8.2 4 6.4.5 6.4-.5 8.2-4h9.4l8.3 4 7.5.5 4.8-6h-.1l-5.2 1.4-6.9-.5-8.3-4h-9.4l-8.2 4-6.4.6-6.5-.6-8.1-4H129l-8.4 4-6.9.6-5-1.3v.2l4.5 5.6z"/>
   </g>
-</svg>
+</svg>