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/km.svg

@@ -13,4 +13,4 @@
     <path fill="#fff" d="M157.2 141.4c-85-4.3-123.9 63.5-123.8 115.9-.2 62 58.6 113 112.8 110C117 353.5 81.2 314.6 81 257c-.3-52.1 29.5-97.5 76.3-115.6z"/>
     <path fill="#fff" d="m156 197-12-9.3-14.6 4.6 5.2-14.4-8.8-12.4 15.2.6 9-12.3 4.3 14.7 14.4 4.8-12.6 8.5zm-.3 52.1-12-9.4-14.6 4.6 5.3-14.3-8.9-12.4 15.3.5 9-12.2 4.2 14.6 14.5 4.9-12.7 8.5zm.2 52.6-12-9.4-14.5 4.6 5.2-14.3-8.8-12.4 15.2.5 9-12.2 4.3 14.6 14.4 4.8-12.6 8.6zm-.2 53-12-9.3L129 350l5.3-14.4-8.9-12.4 15.3.6 9-12.3 4.2 14.7 14.5 4.8-12.7 8.5z"/>
   </g>
-</svg>
+</svg>