feat: get iOS compiling

Author: Kamil Paradowski

packages/react-native-codegen/src/generators/modules/GenerateModuleObjCpp/serializeMethod.js

@@ -51,7 +51,8 @@ type ReturnJSType =
   | 'ObjectKind'
   | 'ArrayKind'
   | 'NumberKind'
-  | 'StringKind';
+  | 'StringKind'
+  | 'ArrayBufferKind';
 
 export type MethodSerializationOutput = Readonly<{
   methodName: string,
@@ -219,6 +220,9 @@ function getParamObjCType(
        */
       return notStruct(wrapOptional('NSArray *', !nullable));
     }
+    case 'ArrayBufferTypeAnnotation': {
+      return notStruct(wrapOptional('NSMutableData *', !nullable));
+    }
   }
 
   const [structTypeAnnotation] = unwrapNullable(
@@ -388,9 +392,7 @@ function getReturnObjCType(
     case 'GenericObjectTypeAnnotation':
       return wrapOptional('NSDictionary *', isRequired);
     case 'ArrayBufferTypeAnnotation':
-      throw new Error(
-        `Unsupported return type for ${methodName}: ArrayBuffer is only supported for C++ TurboModules.`,
-      );
+      return wrapOptional('NSMutableData *', isRequired);
     default:
       typeAnnotation.type as 'MixedTypeAnnotation';
       throw new Error(
@@ -464,9 +466,7 @@ function getReturnJSType(
           throw new Error(`Unsupported union member types`);
       }
     case 'ArrayBufferTypeAnnotation':
-      throw new Error(
-        `Unsupported return type for ${methodName}: ArrayBuffer is only supported for C++ TurboModules.`,
-      );
+      return 'ArrayBufferKind';
     default:
       typeAnnotation.type as 'MixedTypeAnnotation';
       throw new Error(