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/gu.svg

@@ -16,4 +16,4 @@
   <path fill="#bd0728" d="M292.4 226.1v15.2q0 2.6 1 4.3 1.4 2.7 5 2.7 4.1 0 5.7-2.8.8-1.6.8-4.2V226h3.4v13.8q0 4.4-1.4 7-2.1 4.3-8.2 4.3-6.3 0-8.5-4.4-1.2-2.5-1.2-6.9V226zm6.3 0" aria-label="U" font-family="helvetica" font-size="25.6"/>
   <path fill="#bd0728" d="m338.4 240.5-3.7-10.7-4 10.7zM333 226h3.7l9 24.5h-3.8l-2.4-7.3h-9.7l-2.7 7.3h-3.3z" aria-label="A" font-family="helvetica" font-size="25.6"/>
   <path fill="#bd0728" d="M357 226h4.9l6.9 20.7 7-20.7h4.7v24.4h-3.2v-20.6l-7 20.6h-3.1l-7-20.6v20.6H357z" aria-label="M" font-family="helvetica" font-size="25.6"/>
-</svg>
+</svg>