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/br.svg

@@ -42,4 +42,4 @@
     </g>
     <path fill="#309e3a" d="m301.8 204.5 2.3-9.8 7.2 1.7-.3 1.6-5.3-1.2-.5 2.2 4.9 1.1-.4 1.7-4.9-1.2-.6 2.7 5.5 1.3-.4 1.6z"/>
   </g>
-</svg>
+</svg>