MacOS Rider Support

* Adding in code to properly look for rider on macOS
* Also fixing an issue in the macOS CreateProcess where spaces where not properly escaped for popen(which one should likely use NSTask long term)

Source/Editor/Scripting/CodeEditors/RiderCodeEditor.cpp

@@ -210,6 +210,23 @@ void RiderCodeEditor::FindEditors(Array<CodeEditor*>* output)
         TEXT("flatpak run com.jetbrains.Rider"));
 #endif
 
+#if PLATFORM_MAC
+    String applicationSupportFolder;
+    FileSystem::GetSpecialFolderPath(SpecialFolder::ProgramData, applicationSupportFolder);
+    
+    Array<String> subMacDirectories;
+
+    FileSystem::GetChildDirectories(subMacDirectories, applicationSupportFolder / TEXT("JetBrains/Toolbox/apps/Rider/ch-0/"));
+    FileSystem::GetChildDirectories(subMacDirectories, applicationSupportFolder / TEXT("JetBrains/Toolbox/apps/Rider/ch-1/"));
+
+    for (auto directory : subMacDirectories) {
+        String riderAppDirectory = directory / TEXT("Rider.app/Contents/Resources");
+        SearchDirectory(&installations, riderAppDirectory);
+    }
+    // Check the local installer version
+    SearchDirectory(&installations, TEXT("/Applications/Rider.app/Contents/Resources"));
+#endif
+
     for (auto directory : subDirectories)
         SearchDirectory(&installations, directory);
 

Source/Engine/Platform/Mac/MacPlatform.cpp

@@ -462,6 +462,9 @@ int32 MacPlatform::CreateProcess(CreateProcessSettings& settings)
         }
 	}
 
+    // Sanatize the string if the exePath has spaces with properly espcaped spaces for popen
+    exePath.Replace(TEXT(" "), TEXT("\\ "));
+    
     const String cmdLine = exePath + TEXT(" ") + settings.Arguments;
     const StringAsANSI<> cmdLineAnsi(*cmdLine, cmdLine.Length());
     FILE* pipe = popen(cmdLineAnsi.Get(), "r");