Initial commit — Godot space roguelite source

- Touch controls: direct InputEventScreenTouch in shop_ui (bypass relay)
- ItemDB: static preload list instead of DirAccess scan (export fix)
- All 18 items with EN localisation (name_en, desc_en, category_en)
- Ship playstyles: NOVA-1 shield, INFERNO ram, AURORA agile/tank
- Quasar: SMBH visual, jet boost, merge, push, BH-eating
- Atlas & UI text updated EN+DE

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scenes/game_world.tscn

@@ -0,0 +1,6 @@
+[gd_scene format=3 uid="uid://cduyy76lfld7f"]
+
+[ext_resource type="Script" uid="uid://dgjwy8o1rgfd7" path="res://scripts/game_world.gd" id="1_0biqy"]
+
+[node name="GameWorld" type="Node2D" unique_id=536762585]
+script = ExtResource("1_0biqy")