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/sa.svg

@@ -22,4 +22,4 @@
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     <path fill="#165d31" d="M268.1 189.7c-.5 1-2.3 1-4 0s-2.7-2.6-2.1-3.5 2.3-.9 4 0 2.6 2.6 2.1 3.5m-89-53.6c-1 .3-2.4-.6-3-2s-.3-2.6.7-2.9 2.3.7 3 2 .3 2.7-.8 3zM355.2 375c9.4.4 18.2 0 27.5.5 1.7 1.5.5 5-.6 4.8l-7.8-.3c-.1-3-7.7-2.5-7.5.1-4.1.5-7.8-.1-12-.3-1.2-1.5-1-4.2.4-4.8"/>
   </g>
-</svg>
+</svg>