feat: Implemented basic location graph

packages/spatial/package.json

@@ -5,5 +5,8 @@
   "type": "module",
   "exports": {
     ".": "./dist/index.js"
+  },
+  "dependencies": {
+    "@omnia/core": "workspace:*"
   }
 }

packages/spatial/src/index.ts

@@ -1 +1 @@
-export {};
+export * from "./location.js";

packages/spatial/src/location.ts

@@ -0,0 +1,20 @@
+import { AttributableObject } from "@omnia/core";
+
+export class Location extends AttributableObject {
+  parentId: string | null;
+  connections: PortalConnection[] = [];
+
+  constructor(id?: string, parentId: string | null = null) {
+    super(id);
+    this.parentId = parentId;
+  }
+}
+
+export interface PortalConnection {
+  targetId: string;
+  portalName?: string;
+  portalStateDescriptor?: string;
+  visionProp: number; // 0–10
+  soundProp: number; // 0–10
+  bidirectional: boolean;
+}