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/input_common/settings.h

@@ -332,6 +332,9 @@ struct PlayerInput {
     AnalogsRaw analogs;
     MotionRaw motions;
 
+    bool vibration_enabled;
+    int vibration_strength;
+
     u32 body_color_left;
     u32 body_color_right;
     u32 button_color_left;