Implement Bluetooth, Btm, Hid and Nsd services and calls. (#761)

- Implement `btdrv` service (IBluetoothDriver).
  Implement call `InitializeBluetoothLe` for initialize events of `bt` service according to RE.

- Implement `bt` service (IBluetoothUser).
  Implement call `RegisterBleEvent` according to RE.

- Add a placeholder for the `btm` service (close #750).

- Implement `btm:u` service (IBtmUser) (close #751).
  Implement call `GetCore` according to RE (close #752).

- Implement `IBtmUserCore` and calls `AcquireBleScanEvent`, `AcquireBleConnectionEvent`, `AcquireBleServiceDiscoveryEvent` and `AcquireBleMtuConfigEvent` according to RE.

- Implement `SetPalmaBoostMode` in `IHidServer` according to RE.

- Add stub for `SetIsPalmaAllConnectable` in `IHidServer` because we will not support Palma devices soon.

- Implement `nsd:a` and `nsd:u` service (IManager) (close #755).
  Implement call `ResolveEx` according to RE (close #756).
  Implement calls `GetSettingName`, `GetEnvironmentIdentifier`, `GetDeviceId`, `DeleteSettings`, `Resolve`, `ReadSaveDataFromFsForTest`, `WriteSaveDataToFsForTest` and `DeleteSaveDataOfFsForTest` according to RE.

Ryujinx.HLE/HOS/Services/Bluetooth/IBluetoothUser.cs

@@ -0,0 +1,29 @@
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Services.Set;
+
+namespace Ryujinx.HLE.HOS.Services.Bluetooth
+{
+    [Service("bt")]
+    class IBluetoothUser : IpcService
+    {
+        public IBluetoothUser(ServiceCtx context) { }
+
+        [Command(9)]
+        // RegisterBleEvent(pid) -> handle<copy>
+        public ResultCode RegisterBleEvent(ServiceCtx context)
+        {
+            NxSettings.Settings.TryGetValue("bluetooth_debug!skip_boot", out object debugMode);
+
+            if ((bool)debugMode)
+            {
+                context.Response.HandleDesc = IpcHandleDesc.MakeCopy(BluetoothEventManager.RegisterBleDebugEventHandle);
+            }
+            else
+            {
+                context.Response.HandleDesc = IpcHandleDesc.MakeCopy(BluetoothEventManager.RegisterBleEventHandle);
+            }
+
+            return ResultCode.Success;
+        }
+    }
+}