Add: LitMotion Debugger

[yn01-dev]

The MotionTracker window has been removed, and the LitMotion Debugger has been added, which has more powerful functions. This allows you to view data about all motions being played, as well as capture stack traces and search by DebugName.

I have also added WithDebugName(), which allows you to set the debugger display name, and GetDebugName(), which retrieves the debugger display name. These are only enabled in the editor and development builds, and this information will be lost in release builds.

var handle = LMotion.Create(0f, 1f, 1f)
    .WithDebugName("Foo")
    .BindToUnityLogger();

Debug.Log(handle.GetDebugName()); // Foo

Additionally, I implemented ToString() for MotionHandle. This returns string like "MotionHandle`1(0:1)".