Rename NewStateMachine to NewSubStateMachine so that it does not share the same prefix as the more commonly used ".NewState(...)"

Framework/Editor/V0/Aac.cs

@@ -117,14 +117,14 @@ namespace AnimatorAsCode.V0
             return _stateMachine.NewState(name, x, y);
         }
 
-        public AacFlStateMachine NewStateMachine(string name)
+        public AacFlStateMachine NewSubStateMachine(string name)
         {
-            return _stateMachine.NewStateMachine(name);
+            return _stateMachine.NewSubStateMachine(name);
         }
 
-        public AacFlStateMachine NewStateMachine(string name, int x, int y)
+        public AacFlStateMachine NewSubStateMachine(string name, int x, int y)
         {
-            return _stateMachine.NewStateMachine(name, x, y);
+            return _stateMachine.NewSubStateMachine(name, x, y);
         }
 
         public AacFlTransition AnyTransitionsTo(AacFlState destination)

Framework/Editor/V0/AacFlStates.cs

@@ -139,13 +139,13 @@ namespace AnimatorAsCode.V0
             return _backingAnimator;
         }
 
-        public AacFlStateMachine NewStateMachine(string name)
+        public AacFlStateMachine NewSubStateMachine(string name)
         {
             var lastState = LastNodePosition();
-            return NewStateMachine(name, 0, 0).Shift(lastState, 0, 1);
+            return NewSubStateMachine(name, 0, 0).Shift(lastState, 0, 1);
         }
 
-        public AacFlStateMachine NewStateMachine(string name, int x, int y)
+        public AacFlStateMachine NewSubStateMachine(string name, int x, int y)
         {
             var stateMachine = Machine.AddStateMachine(name, GridPosition(x, y));
             var aacMachine = new AacFlStateMachine(stateMachine, _emptyClip, _backingAnimator, DefaultsProvider, this);