Fix init-windows template to use conditional codegen includes

Co-authored-by: anupriya13 <[email protected]>

Author: Copilot

vnext/templates/cpp-lib/windows/MyLib/MyLib.h

@@ -6,7 +6,12 @@
 #if __has_include("codegen/Native{{ pascalName }}DataTypes.g.h")
   #include "codegen/Native{{ pascalName }}DataTypes.g.h"
 #endif
-#include "codegen/Native{{ pascalName }}Spec.g.h"
+// TODO: Update this include to match your actual TurboModule name
+// For example, if your module is named 'MyCustomModule', use:
+// #include "codegen/NativeMyCustomModuleSpec.g.h"
+#if __has_include("codegen/Native{{ pascalName }}Spec.g.h")
+  #include "codegen/Native{{ pascalName }}Spec.g.h"
+#endif
 
 #include "NativeModules.h"
 
@@ -18,7 +23,16 @@ namespace winrt::{{ namespaceCpp }}
 REACT_MODULE({{ pascalName }})
 struct {{ pascalName }}
 {
+  // TODO: Update this to match your actual TurboModule spec name
+  // For example, if your module is named 'MyCustomModule', use:
+  // using ModuleSpec = {{ namespaceCpp }}Codegen::MyCustomModuleSpec;
+#ifdef __has_include
+#if __has_include("codegen/Native{{ pascalName }}Spec.g.h")
+  using ModuleSpec = {{ namespaceCpp }}Codegen::{{ pascalName }}Spec;
+#endif
+#else
   using ModuleSpec = {{ namespaceCpp }}Codegen::{{ pascalName }}Spec;
+#endif
 
   REACT_INIT(Initialize)
   void Initialize(React::ReactContext const &reactContext) noexcept;