configure_input: Add per-player vibration

Allows for enabling and modifying vibration and vibration strength per player.
Also adds a toggle for enabling/disabling accurate vibrations.

Co-authored-by: Its-Rei <kupfel@gmail.com>

src/core/settings.h

@@ -170,6 +170,7 @@ struct Values {
     Setting<bool> use_docked_mode;
 
     Setting<bool> vibration_enabled;
+    Setting<bool> enable_accurate_vibrations;
 
     Setting<bool> motion_enabled;
     std::string motion_device;