refactor: Disable custom image resizer for macOS and windows

lib/utils/client_manager.dart

@@ -123,7 +123,9 @@ abstract class ClientManager {
         // To make room emotes work
         'im.ponies.room_emotes',
       },
-      customImageResizer: customImageResizer,
+      customImageResizer: PlatformInfos.supportsCustomImageResizer
+          ? customImageResizer
+          : null,
       logLevel: kReleaseMode ? Level.warning : Level.verbose,
       database: await flutterMatrixSdkDatabaseBuilder(clientName),
       supportedLoginTypes: {

lib/utils/platform_infos.dart

@@ -33,6 +33,9 @@ abstract class PlatformInfos {
   static bool get supportsVideoPlayer =>
       !PlatformInfos.isWindows && !PlatformInfos.isLinux;
 
+  static bool get supportsCustomImageResizer =>
+      PlatformInfos.isWeb || PlatformInfos.isMobile;
+
   /// Web could also record in theory but currently only wav which is too large
   static bool get platformCanRecord => (isMobile || isMacOS || isWeb);