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/sx.svg

@@ -53,4 +53,4 @@
     <path d="M93.4 215.6c.3.9-.6 1-1.1 1.4q-.8 0-1.4-.6c-.3-1 .5-1.2 1-1.6.7-.3 1 .5 1.5.8"/>
     <path fill="#fff" d="M92.5 216.2q-.2.2-.6.2l-.2-1q1-.1.8.8"/>
   </g>
-</svg>
+</svg>