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/mk.svg

@@ -2,4 +2,4 @@
   <path fill="#d20000" d="M0 0h640v480H0z"/>
   <path fill="#ffe600" d="M0 0h96l224 231.4L544 0h96L0 480h96l224-231.4L544 480h96zm640 192v96L0 192v96zM280 0l40 205.7L360 0zm0 480 40-205.7L360 480z"/>
   <circle cx="320" cy="240" r="77.1" fill="#ffe600" stroke="#d20000" stroke-width="17.1"/>
-</svg>
+</svg>