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/dz.svg

@@ -2,4 +2,4 @@
   <path fill="#fff" d="M320 0h320v480H320z"/>
   <path fill="#006233" d="M0 0h320v480H0z"/>
   <path fill="#d21034" d="M424 180a120 120 0 1 0 0 120 96 96 0 1 1 0-120m4 60-108-35.2 67.2 92V183.2l-67.2 92z"/>
-</svg>
+</svg>