Refactor SVG gradients and IDs for consistency and clarity

- Updated gradient IDs in google_chrome_icon.svg to be more descriptive.
- Refactored gradient IDs in grafana.svg for better identification.
- Changed gradient IDs in homebridge.svg to follow a consistent naming convention.
- Modified gradient IDs in jellyfin.svg for clarity and consistency.
- Updated gradient IDs in shadoll.svg to avoid conflicts.
- Renamed ID in tesla.svg for better identification.
- Enhanced svg-cleanup.js to fix single-letter ID conflicts by prefixing them with the filename, improving SVG file integrity.

public/images/flags/ua-BilaCerkva.svg

@@ -9,11 +9,11 @@
         <path d="M143,190 V143 a7 7 0 0 1 14 0 V190 Z" fill="#d40000" />
         <path d="M143,107 V78 a7 7 0 0 1 14 0 V107 Z" fill="#d40000" />
         <path d="M115,153 a35 35 0 0 1 70 0 " fill="none" stroke="#d40000" stroke-width="2" />
-        <g id="t">
+        <g id="ua-BilaCerkva_t">
             <rect width="34" height="130" x="80" y="130" fill="#fff" />
             <path d="M90,190 V162 a7 7 0 0 1 14 0 V190 Z" fill="#d40000" />
             <path d="M79,153 a18 18 0 0 1 36 0 " fill="none" stroke="#d40000" stroke-width="2" />
         </g>
-        <use xlink:href="#t" x="106" />
+        <use xlink:href="#ua-BilaCerkva_t" x="106" />
     </g>
 </svg>