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/um.svg

@@ -6,4 +6,4 @@
     <path fill="#fff" d="m14 0 9 27L0 10h28L5 27z"/>
   </marker>
   <path fill="none" marker-mid="url(#um-a)" d="m0 0 16 11h61 61 61 61 60L47 37h61 61 60 61L16 63h61 61 61 61 60L47 89h61 61 60 61L16 115h61 61 61 61 60L47 141h61 61 60 61L16 166h61 61 61 61 60L47 192h61 61 60 61L16 218h61 61 61 61 60z"/>
-</svg>
+</svg>