feat(ios): enable function generation by Xcode with CodeGen interface (#267)

When I use Turbo module, today If I define a new method (on JS side) in my turbo module interface Native{%- project.name %}.ts, codegen generates new files. But I do not have in Xcode any warning or error that tells me to implement this new method.

Closes #261

Co-authored-by: Bartosz Klonowski <[email protected]>

Co-authored-by: Bartosz Klonowski <[email protected]>

Author: taboulot

packages/create-react-native-library/templates/objc-library/ios/{%- project.name %}.h

@@ -1,5 +1,11 @@
+#ifdef RCT_NEW_ARCH_ENABLED
+#import "RN<%- project.name -%>Spec.h"
+
+@interface <%- project.name -%> : NSObject <Native<%- project.name -%>Spec>
+#else
 #import <React/RCTBridgeModule.h>
 
 @interface <%- project.name -%> : NSObject <RCTBridgeModule>
+#endif
 
 @end

packages/create-react-native-library/templates/objc-library/ios/{%- project.name %}.mm

@@ -1,25 +1,34 @@
 #import "<%- project.name -%>.h"
 
-#ifdef RCT_NEW_ARCH_ENABLED
-#import "RN<%- project.name -%>Spec.h"
-#endif
-
 @implementation <%- project.name -%>
 
 RCT_EXPORT_MODULE()
 
+<% if (project.architecture == 'turbo') { -%>
+- (NSNumber *)multiply:(double)a b:(double)b {
+    NSNumber *result = @(a * b);
+
+    return result;
+}
+<% } else if (project.architecture == 'mixed') { -%>
 // Example method
 // See // https://reactnative.dev/docs/native-modules-ios
-<% if (project.architecture == 'turbo') { -%>
-RCT_REMAP_BLOCKING_SYNCHRONOUS_METHOD(multiply,
-                                      NSNumber *,
-                                      multiplyWithA:(double)a  withB:(double)b)
+RCT_REMAP_METHOD(multiply,
+                 multiplyWithA:(double)a  withB:(double)b
+                 withResolver:(RCTPromiseResolveBlock)resolve
+                 withRejecter:(RCTPromiseRejectBlock)reject)
 {
+    [self multiply:a b:b resolve:resolve reject:reject];
+}
+
+- (void)multiply:(double)a b:(double)b resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject {
     NSNumber *result = @(a * b);
 
-    return result;
+    resolve(result);
 }
 <% } else { -%>
+// Example method
+// See // https://reactnative.dev/docs/native-modules-ios
 RCT_REMAP_METHOD(multiply,
                  multiplyWithA:(double)a withB:(double)b
                  withResolver:(RCTPromiseResolveBlock)resolve