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/th.svg

@@ -4,4 +4,4 @@
     <path fill="#2d2a4a" d="M0 162.5h640v160H0z"/>
     <path fill="#a51931" d="M0 0h640v82.5H0zm0 400h640v80H0z"/>
   </g>
-</svg>
+</svg>