Initial commit: Transcience MVP

Top-down twin-stick bullet-hell, Godot 4.7, server-authoritative dedicated
server with client-side prediction. Clients send input only; the server
resolves every hit for both players and enemies (no PvP).

- SimWorld: whole simulation as plain RefCounted objects (no nodes, no
  physics server), ~0.24ms/tick at peak load -- runs headless for free and
  drives 78 tests in under a second
- BulletPool: struct-of-arrays bullet storage, replicated as spawn/despawn
  events rather than per-tick state
- Emitter framework (Ring/AimedSpread/WallGap/ArcSweep) shared by trash
  enemies and bosses -- a new boss is data in src/content/content.gd, no
  simulation changes
- The Warden of the Fold: stationary 4-phase boss built entirely on that
  format
- Lobby hub with a portal into on-demand dungeon instances; one process
  hosts the hub plus every concurrent dungeon
- Emergency escape: 3s server-owned channel, cancelled by damage
- tools/check.sh, test.sh (GUT), smoke.sh (real server + bot clients over
  ENet), bench.gd; git hooks wired to the same scripts
- docs/ARCHITECTURE.md, NETCODE.md, WORKFLOW.md, ROADMAP.md

addons/gut/gui/ResultsTree.tscn

@@ -0,0 +1,34 @@
+[gd_scene format=3 uid="uid://dls5r5f6157nq"]
+
+[ext_resource type="Script" uid="uid://dehdhn78qv5tr" path="res://addons/gut/gui/ResultsTree.gd" id="1_b4uub"]
+
+[node name="ResultsTree" type="Tree" unique_id=1240770657]
+offset_right = 1082.0
+offset_bottom = 544.0
+size_flags_horizontal = 3
+size_flags_vertical = 3
+columns = 2
+hide_root = true
+script = ExtResource("1_b4uub")
+
+[node name="TextOverlay" type="Label" parent="." unique_id=1487654929]
+visible = false
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="ResultsTree" type="VBoxContainer" parent="." unique_id=87055617]
+custom_minimum_size = Vector2(10, 10)
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_right = -70.0
+offset_bottom = -104.0
+grow_horizontal = 2
+grow_vertical = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3