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/tz.svg

@@ -10,4 +10,4 @@
     <path fill="#000001" d="M0 120h40l140-95V0h-40L0 95z"/>
     <path fill="#ff0" d="M0 91.5 137.2 0h13.5L0 100.5zM29.3 120 180 19.5v9L42.8 120z"/>
   </g>
-</svg>
+</svg>