logic: add storage transformation to merge anonymous types and the respective typedef

* moved storage related classes to data/storage folder
* implemented recording c++ unions as NODE_UNION instead of just using NODE_TYPE
* added transformation to merge anonymous classes/structs/enums/unions and typedef nodes
* added tests for this transformation
* added setting for enabling/disabling this transformation

bin/app/data/color_schemes/bad_rainbow.xml

@@ -240,6 +240,9 @@
 			<enum>
 				<like>type</like>
 			</enum>
+			<union>
+				<like>type</like>
+			</union>
 			<typedef>
 				<like>type</like>
 			</typedef>

bin/app/data/color_schemes/bright.xml

@@ -232,6 +232,9 @@
 			<enum>
 				<like>type</like>
 			</enum>
+			<union>
+				<like>type</like>
+			</union>
 			<typedef>
 				<like>type</like>
 			</typedef>

bin/app/data/color_schemes/dark.xml

@@ -235,6 +235,9 @@
 			<enum>
 				<like>type</like>
 			</enum>
+			<union>
+				<like>type</like>
+			</union>
 			<typedef>
 				<like>type</like>
 			</typedef>