HLE: Implement IHidServer IsSixAxisSensorAtRest

Fixes the actually insane amount of log spam in games that check for this, such as Luigi's Mansion 3.

Values in HidDevices.NpadDevices.isAtRest may need to be tuned to a better range for resting detection. I originally set them to 0, and my controller rests at definitely NOT 0.

Will need to be revisited when implementing functionality for the global SixAxisActive bool, IHidServer.StartSixAxisTracking, and IHidServer.StopSixAxisTracking.

Fun side effect: enables motion in Pokémon: Let's Go, Pikachu! and Pokémon: Let's Go, Eevee! -- apparently these games read whether the six axis starts, then stops moving for its features.