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/gi.svg

@@ -29,4 +29,4 @@
       <path stroke-linejoin="round" d="M228.7 102.4v54.4h12.8v-20.4c0-9.5 6.4-14 14.5-14 7.8 0 14.5 4.5 14.5 14v20.4h12.8v-54.4z"/>
     </g>
   </g>
-</svg>
+</svg>