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/gb-nir.svg

@@ -129,4 +129,4 @@
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     <path fill="none" d="M307.4 239.2q5.2-2 10.6-3.6c4.3-1.2 8.5-3 13-3.6q3-.9 6.4-1m-36.1 42c.4-.3 1 .2 1.4.3q1 .4 2 .3h4q2.5.1 4.3-1m10 .6 1.6.9c.8.3 1.8.4 7.3 0 3.5.2 6.5-2.8 7.4-3.6"/>
   </g>
-</svg>
+</svg>