register cpp as source folder for intellij

Author: littleaj

core/native.gradle

@@ -20,6 +20,7 @@
  */
 
 apply plugin: 'cpp'
+apply plugin: 'idea'
 
 buildscript {
     repositories {
@@ -46,6 +47,12 @@ if (System.env.APPINSIGHTS_VS_PATH) {
     println "Using custom Visual Studio Tools path: $vsToolsDir"
 }
 
+idea {
+    module {
+        sourceDirs += file("$projectDir/src/windows/cpp")\
+    }
+}
+
 // region Native binary definition and configuration
 model {
     toolChains {