Use qtquickcompiler

It might not do a lot in this project but it's easy to add and
in theory it makes the app start a tiny bit faster, although
my tests didn't show any visible improvements, I guess it's
because there are not enough QML files to parse at startup.

FeedTheMonkey.pro

@@ -9,6 +9,7 @@ TARGET = feedthemonkey
 TEMPLATE = app
 QT += qml quick webenginewidgets webengine
 CONFIG += c++11
+CONFIG += qtquickcompiler
 
 SOURCES += \
     src/main.cpp \