修改坡度计算逻辑，骑行界面大部分完成

Assets/Scenes/Ride/Scripts/Interface/IHeartRateDevice.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Assets.Scenes.Ride.Scripts.Interface
+{
+    public interface IHeartRateDevice
+    {
+        int HeartRate { get; set; }
+    }
+}