Add rudimentary dialogue system.

Dialogue.tscn

@@ -0,0 +1,39 @@
+[gd_scene format=3 uid="uid://bla1cfndgad0"]
+
+[ext_resource type="Script" uid="uid://byj4ibepgm6oa" path="res://dialogue.gd" id="1_tgtc2"]
+
+[node name="Dialogue" type="Control" unique_id=1025022375]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_tgtc2")
+
+[node name="Panel" type="Panel" parent="." unique_id=1878574619]
+layout_mode = 1
+anchors_preset = -1
+anchor_left = 0.179
+anchor_top = 0.683
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_left = -230.12001
+offset_top = -493.76
+offset_right = -230.0
+offset_bottom = -494.0
+grow_horizontal = 0
+grow_vertical = 0
+
+[node name="Text" type="RichTextLabel" parent="Panel" unique_id=1494828842]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_left = 8.0
+offset_top = 11.0
+offset_right = -11.0
+offset_bottom = 4.0
+grow_horizontal = 2
+grow_vertical = 2
+bbcode_enabled = true