yuzu: Move compatibility list specifics to their own source files

Lets us keep the generic portions of the compatibility list code
together, and allows us to introduce a type alias that makes it so we
don't need to type out a very long type declaration anymore, making the
immediate readability of some code better.

src/citra_qt/CMakeLists.txt

@@ -14,6 +14,8 @@ add_executable(citra-qt
     applets/swkbd.h
     bootmanager.cpp
     bootmanager.h
+    compatibility_list.cpp
+    compatibility_list.h
     camera/camera_util.cpp
     camera/camera_util.h
     camera/still_image_camera.cpp