Replace branding assets with Biibaye SVGs and favicons

- Updated all favicon files with Biibaye-branded icons
- Updated logo SVGs and icon PNGs
- Updated extension.js favicon references to match new filenames
- Updated browserconfig.xml with correct paths and #FF4500 tile color

public/favicon/browserconfig.xml

@@ -2,8 +2,10 @@
 <browserconfig>
     <msapplication>
         <tile>
-            <square150x150logo src="/favicon/mstile-150x150.png"/>
-            <TileColor>#da532c</TileColor>
+            <square70x70logo src="/favicon/ms-icon-70x70.png"/>
+            <square150x150logo src="/favicon/ms-icon-150x150.png"/>
+            <square310x310logo src="/favicon/ms-icon-310x310.png"/>
+            <TileColor>#FF4500</TileColor>
         </tile>
     </msapplication>
 </browserconfig>