Initial commit: Theriapolis baseline at port/godot branch point

Captures the pre-Godot-port state of the codebase. This is the rollback
anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md).
All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Content/Data/room_templates/imperium/boss_throne_room.json

@@ -0,0 +1,41 @@
+{
+  "id": "imperium.boss_throne_room",
+  "name": "Throne Room",
+  "type": "imperium",
+  "built_by": "imperium",
+  "size_class": "large",
+  "roles_eligible": ["boss"],
+  "footprint_w_tiles": 14,
+  "footprint_h_tiles": 10,
+  "grid": [
+    "##############",
+    "#............#",
+    "#.P........P.#",
+    "#............#",
+    "D....@..@....#",
+    "#......@.....#",
+    "#............#",
+    "#.P...C....P.#",
+    "#............#",
+    "##############"
+  ],
+  "doors": [
+    { "x": 0, "y": 4, "facing": "W" }
+  ],
+  "encounter_slots": [
+    { "x": 5, "y": 4, "kind": "PoiGuard", "weight": 1.0 },
+    { "x": 8, "y": 4, "kind": "PoiGuard", "weight": 1.0 },
+    { "x": 7, "y": 5, "kind": "Boss",     "weight": 1.0 }
+  ],
+  "container_slots": [
+    { "x": 6, "y": 7, "loot_table_band": "t3" }
+  ],
+  "decos": [
+    { "x": 2,  "y": 2, "deco": "pillar" },
+    { "x": 11, "y": 2, "deco": "pillar" },
+    { "x": 2,  "y": 7, "deco": "pillar" },
+    { "x": 11, "y": 7, "deco": "pillar" }
+  ],
+  "narrative_text": "A throne of black stone sits at the chamber's far end. The figure slumped in it has not been alive for a very long time, and yet — something behind its hollow eyes still tracks you.",
+  "weight": 1.0
+}