Add VRChat and GitHub packages to Unity project

Assets/Udon/Editor/ProgramSources/UdonAssemblyProgram/UdonAssemblyProgramAsset.cs

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+using System;
+using System.Collections.Generic;
+using JetBrains.Annotations;
+using UnityEditor;
+using UnityEngine;
+using VRC.Udon.Editor;
+using VRC.Udon.Editor.ProgramSources;
+using VRC.Udon.Editor.ProgramSources.Attributes;
+
+[assembly: UdonProgramSourceNewMenu(typeof(UdonAssemblyProgramAsset), "Udon Assembly Program Asset")]
+
+namespace VRC.Udon.Editor.ProgramSources
+{
+    [CreateAssetMenu(menuName = "VRChat/Udon/Udon Assembly Program Asset", fileName = "New Udon Assembly Program Asset")]
+    public class UdonAssemblyProgramAsset : UdonProgramAsset
+    {
+        [SerializeField]
+        protected string udonAssembly = "";
+
+        [SerializeField]
+        protected string assemblyError = null;
+
+        public delegate void AssembleDelegate(bool success, string assembly);
+        public event AssembleDelegate OnAssemble;
+
+        protected override void DrawProgramSourceGUI(UdonBehaviour udonBehaviour, ref bool dirty)
+        {
+            DrawAssemblyTextArea(!Application.isPlaying, ref dirty);
+            DrawAssemblyErrorTextArea();
+
+            base.DrawProgramSourceGUI(udonBehaviour, ref dirty);
+        }
+
+        protected override void RefreshProgramImpl()
+        {
+            AssembleProgram();
+        }
+
+        [PublicAPI]
+        protected virtual void DrawAssemblyTextArea(bool allowEditing, ref bool dirty)
+        {
+            EditorGUILayout.LabelField("Assembly Code", EditorStyles.boldLabel);
+            if(GUILayout.Button("Copy Assembly To Clipboard"))
+            {
+                EditorGUIUtility.systemCopyBuffer = udonAssembly;
+            }
+
+            EditorGUI.BeginChangeCheck();
+            using(new EditorGUI.DisabledScope(!allowEditing))
+            {
+                string newAssembly = EditorGUILayout.TextArea(udonAssembly);
+                if(EditorGUI.EndChangeCheck())
+                {
+                    dirty = true;
+                    Undo.RecordObject(this, "Edit Assembly Program Code");
+                    udonAssembly = newAssembly;
+                    UdonEditorManager.Instance.QueueAndRefreshProgram(this);
+                }
+            }
+        }
+
+        [PublicAPI]
+        protected void DrawAssemblyErrorTextArea()
+        {
+            if(string.IsNullOrEmpty(assemblyError))
+            {
+                return;
+            }
+
+            EditorGUILayout.LabelField("Assembly Error", EditorStyles.boldLabel);
+            using(new EditorGUI.DisabledScope(true))
+            {
+                EditorGUILayout.TextArea(assemblyError);
+            }
+        }
+
+        [PublicAPI]
+        protected void AssembleProgram()
+        {
+            try
+            {
+                program = UdonEditorManager.Instance.Assemble(udonAssembly);
+                assemblyError = null;
+                OnAssemble?.Invoke(true, udonAssembly);
+            }
+            catch(Exception e)
+            {
+                program = null;
+                assemblyError = e.Message;
+                Debug.LogException(e);
+                OnAssemble?.Invoke(false, assemblyError);
+            }
+        }
+
+    }
+}