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/by-1918,1991–1995.svg

@@ -1,4 +1,4 @@
 <svg xmlns="http://www.w3.org/2000/svg" shape-rendering="crispEdges" viewBox="0 0 1200 600" width="100%" height="100%">
     <path d="M0 0h1200v600H0" fill="#fff" />
     <path d="M0 200h1200v200H0" fill="#c00" />
-</svg>
+</svg>