Add old vrcboardimage script as vrcboardimagebasic

!Prefabs & Examples/ImagePoster.prefab

@@ -30,7 +30,7 @@ Transform:
   serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0.7071068, z: -0.7071068, w: 0}
   m_LocalPosition: {x: -4.13, y: 4.49, z: 35.1}
-  m_LocalScale: {x: 4, y: 5, z: 1}
+  m_LocalScale: {x: 2.87469, y: 5.11056, z: 0.31941}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 0}
@@ -59,12 +59,13 @@ MonoBehaviour:
   _udonSharpBackingUdonBehaviour: {fileID: 9181003179774458621}
   manager: {fileID: 0}
   uploaderIdOverride: 
+  materialIndex: 0
   imageIds:
-  - 1234
+  - 883058
   texturePropertyMappings:
   - _MainTex
   defaultTextures:
-  - {fileID: 0}
+  - {fileID: 10300, guid: 0000000000000000f000000000000000, type: 0}
 --- !u!33 &2163663917368825931
 MeshFilter:
   m_ObjectHideFlags: 0
@@ -93,7 +94,7 @@ MeshRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: 2100000, guid: 66b314f6e6cbc5a4a97f18dde3864299, type: 2}
+  - {fileID: 0}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0