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/sc.svg

@@ -4,4 +4,4 @@
   <path fill="#fcd955" d="M0 480V0h426.7z"/>
   <path fill="#003d88" d="M0 480V0h213.3z"/>
   <path fill="#007a39" d="m0 480 640-160v160z"/>
-</svg>
+</svg>