feat: add multi-world hub system with lobby portals and hub-return addon

Lobby addon detects players in portal zones at X: -15/0/15 and transfers
them to Jamie/Lyla/Mya survival worlds. Hub-return addon gives players a
recovery compass and chat commands (!hub, !lobby) to return to the lobby.

Includes docker-compose.yml for 4 Bedrock servers (lobby + 3 child worlds),
spark pet behavior/resource packs, and updated .gitignore.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

addon/spark_pet_RP/animation_controllers/dragon_egg.animation_controllers.json

@@ -0,0 +1,41 @@
+{
+  "format_version": "1.10.0",
+  "animation_controllers": {
+    "controller.animation.dragon_egg": {
+      "initial_state": "cold",
+      "states": {
+        "cold": {
+          "animations": ["idle"],
+          "transitions": [
+            { "warming": "query.property('silverlabs:egg_stage') == 1" }
+          ]
+        },
+        "warming": {
+          "animations": ["wobble"],
+          "particle_effects": [
+            { "effect": "smoke" }
+          ],
+          "transitions": [
+            { "hot": "query.property('silverlabs:egg_stage') == 2" }
+          ]
+        },
+        "hot": {
+          "animations": ["shake"],
+          "particle_effects": [
+            { "effect": "flame" },
+            { "effect": "smoke" }
+          ],
+          "transitions": [
+            { "hatching": "query.property('silverlabs:egg_stage') == 3" }
+          ]
+        },
+        "hatching": {
+          "animations": ["shake"],
+          "particle_effects": [
+            { "effect": "flame" }
+          ]
+        }
+      }
+    }
+  }
+}

addon/spark_pet_RP/animation_controllers/dragon_gravestone.animation_controllers.json

@@ -0,0 +1,26 @@
+{
+  "format_version": "1.10.0",
+  "animation_controllers": {
+    "controller.animation.dragon_gravestone": {
+      "initial_state": "active",
+      "states": {
+        "active": {
+          "animations": ["idle"],
+          "particle_effects": [
+            { "effect": "memorial_glow" }
+          ]
+        }
+      }
+    },
+    "controller.animation.dragon_gravestone.beacon": {
+      "initial_state": "active",
+      "states": {
+        "active": {
+          "particle_effects": [
+            { "effect": "beacon_beam" }
+          ]
+        }
+      }
+    }
+  }
+}

addon/spark_pet_RP/animation_controllers/spark_dragon.animation_controllers.json

@@ -0,0 +1,95 @@
+{
+  "format_version": "1.10.0",
+  "animation_controllers": {
+    "controller.animation.spark_dragon.beacon": {
+      "initial_state": "inactive",
+      "states": {
+        "inactive": {
+          "transitions": [
+            { "active": "query.property('silverlabs:beacon_active')" }
+          ]
+        },
+        "active": {
+          "particle_effects": [
+            { "effect": "beacon_beam" }
+          ],
+          "transitions": [
+            { "inactive": "!query.property('silverlabs:beacon_active')" }
+          ]
+        }
+      }
+    },
+    "controller.animation.spark_dragon": {
+      "initial_state": "idle",
+      "states": {
+        "idle": {
+          "animations": ["idle"],
+          "transitions": [
+            { "flying": "!query.is_on_ground && query.property('silverlabs:growth_stage') == 2" },
+            { "walking": "query.modified_move_speed > 0.1" },
+            { "sleeping": "query.is_sitting && (query.day_light_level < 4)" },
+            { "sitting": "query.is_sitting" }
+          ]
+        },
+        "walking": {
+          "animations": ["walk"],
+          "transitions": [
+            { "flying": "!query.is_on_ground && query.property('silverlabs:growth_stage') == 2" },
+            { "idle": "query.modified_move_speed <= 0.1" },
+            { "sitting": "query.is_sitting" }
+          ]
+        },
+        "sitting": {
+          "animations": ["sit"],
+          "transitions": [
+            { "idle": "!query.is_sitting" },
+            { "sleeping": "query.is_sitting && (query.day_light_level < 4)" }
+          ]
+        },
+        "sleeping": {
+          "animations": ["sleep"],
+          "transitions": [
+            { "idle": "!query.is_sitting" },
+            { "sitting": "query.is_sitting && (query.day_light_level >= 4)" }
+          ]
+        },
+        "flying": {
+          "animations": ["fly"],
+          "transitions": [
+            { "idle": "query.is_on_ground && query.modified_move_speed <= 0.1" },
+            { "walking": "query.is_on_ground && query.modified_move_speed > 0.1" }
+          ]
+        }
+      }
+    },
+    "controller.animation.spark_dragon.mood": {
+      "initial_state": "content",
+      "states": {
+        "happy": {
+          "particle_effects": [
+            { "effect": "mood_happy" }
+          ],
+          "transitions": [
+            { "content": "query.property('silverlabs:mood') == 1" },
+            { "needy": "query.property('silverlabs:mood') == 0" }
+          ]
+        },
+        "content": {
+          "transitions": [
+            { "happy": "query.property('silverlabs:mood') == 2" },
+            { "needy": "query.property('silverlabs:mood') == 0" }
+          ]
+        },
+        "needy": {
+          "particle_effects": [
+            { "effect": "mood_needy" }
+          ],
+          "transitions": [
+            { "happy": "query.property('silverlabs:mood') == 2" },
+            { "content": "query.property('silverlabs:mood') == 1" }
+          ]
+        }
+      }
+    }
+  }
+}