configure_input: Add ConfigureInputSimple as default input UI config

Greatly simplifies the current input UI, while still allowing power users to tweak advanced settings. Adds 'input profiles', which are easy autoconfigurations to make getting started easy and fast. Also has a custom option which brings up the current, full UI.

src/yuzu/configuration/config.h

@@ -34,6 +34,7 @@ private:
     void ReadKeyboardValues();
     void ReadMouseValues();
     void ReadTouchscreenValues();
+    void ApplyDefaultProfileIfInputInvalid();
 
     void SaveValues();
     void SavePlayerValues();