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/af.svg

@@ -78,4 +78,4 @@
   </g>
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-</svg>
+</svg>