Add new meta files and initial implementations for VRCBoard components and materials

Materials/Editor/VRCBoardShaderEditor.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UdonSharp;
+using UnityEngine;
+using UnityEditor;
+
+namespace VRCBoard
+{
+    [UdonBehaviourSyncMode(BehaviourSyncMode.Manual)]
+    public class VRCBoardShaderEditor : ShaderGUI 
+    {
+        // Start is called before the first frame update
+        public override void OnGUI(MaterialEditor materialEditor, MaterialProperty[] properties)
+        {
+            EditorGUILayout.LabelField("Please use the VRCBoardImage component to edit the material properties.");
+            //base.OnGUI(materialEditor, properties);
+        }
+    }
+
+}

Materials/Editor/VRCBoardShaderEditor.cs.meta

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+fileFormatVersion: 2
+guid: 54050364012eda64b93ac4539faa4a15
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: