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/mv.svg

@@ -3,4 +3,4 @@
   <path fill="#007e3a" d="M120 120h400v240H120z"/>
   <circle cx="350" cy="240" r="80" fill="#fff"/>
   <circle cx="380" cy="240" r="80" fill="#007e3a"/>
-</svg>
+</svg>