Add missing Sampler State types

- Trilinear
- Mirror
- MirrorOnce

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Graphs/TextureSamplerState.cs

         public enum FilterMode
         {
             Linear,
-            Point
+            Point,
+            Trilinear
-            Clamp
+            Clamp,
+            Mirror,
+            MirrorOnce
         }
 
         [SerializeField] private FilterMode m_filter = FilterMode.Linear;