Added basic window for programming with the DSL. Need to add functionality to it.

Prefabs/ProgramNode.tscn

@@ -0,0 +1,30 @@
+[gd_scene format=3 uid="uid://bst1eqq4jxq5h"]
+
+[node name="ProgramNode" type="Control" unique_id=854534882]
+custom_minimum_size = Vector2(0, 20)
+layout_mode = 3
+anchors_preset = 14
+anchor_top = 0.5
+anchor_right = 1.0
+anchor_bottom = 0.5
+grow_horizontal = 2
+grow_vertical = 2
+size_flags_horizontal = 3
+
+[node name="Node" type="PanelContainer" parent="." unique_id=545984394]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="NodeContainer" type="CenterContainer" parent="Node" unique_id=1325851867]
+layout_mode = 2
+
+[node name="NodeText" type="RichTextLabel" parent="Node/NodeContainer" unique_id=1944532693]
+layout_mode = 2
+bbcode_enabled = true
+text = "[font_size=30]Text[/font_size]"
+fit_content = true
+autowrap_mode = 0