Add VRChat and GitHub packages to Unity project

Assets/Udon/Editor/ProgramSources/UdonGraphProgram/UI/GraphView/UdonProgramSourceView.cs

@@ -0,0 +1,56 @@
+using UnityEngine.Experimental.UIElements;
+
+namespace VRC.Udon.Editor.ProgramSources.UdonGraphProgram.UI.GraphView
+{
+    public class UdonProgramSourceView : VisualElement
+    {
+        private UdonProgramAsset _asset;
+
+        private VisualContainer _assemblyContainer;
+        private ScrollView _scrollView;
+        private Label _assemblyHeader;
+        private TextElement _assemblyField;
+
+        public UdonProgramSourceView ()
+        {
+            // Create and add container and children to display latest Assembly
+            _assemblyContainer = new VisualContainer() { name = "Container", };
+            _assemblyHeader = new Label("Udon Assembly")
+            {
+                name = "Header",
+            };
+
+            _scrollView = new ScrollView();
+
+            _assemblyField = new TextElement()
+            {
+                name = "AssemblyField",
+            };
+
+            _assemblyContainer.Add(_assemblyHeader);
+            _assemblyContainer.Add(_scrollView);
+            _assemblyContainer.Add(_assemblyField);
+            _scrollView.SetContents(_assemblyField);
+
+            Add(_assemblyContainer);
+        }
+
+        public void LoadAsset(UdonGraphProgramAsset asset)
+        {
+            _asset = asset;
+        }
+
+        public void SetText(string newValue)
+        {
+            _assemblyField.text = newValue;
+        }
+
+        public void Unload()
+        {
+            if(_asset != null)
+            {
+                _asset = null;
+            }
+        }
+    }
+}