fix: handle edge object in serialization tests

Add `typecheck` script to package.json, expand tsconfig include
paths to cover tests and examples, and update serialization tests
to correctly resolve player IDs from relationship edges.

package.json

@@ -29,6 +29,7 @@
   "scripts": {
     "build": "tsup",
     "dev": "tsup --watch",
+    "typecheck": "tsc --noEmit",
     "test": "vitest run",
     "prepublishOnly": "npm run build"
   },

test/serialization.test.ts

@@ -277,7 +277,9 @@ describe("Serialization — complex state", () => {
       const comps = snap.entities[id];
       return comps.position && comps.velocity && !comps.health;
     })!;
-    const playerId = snap.relationships.ownedBy[bulletId];
+    const playerEdge = snap.relationships.ownedBy[bulletId];
+    const playerId =
+      typeof playerEdge === "string" ? playerEdge : playerEdge.target;
 
     // Player should have a name
     const playerComps = snap.entities[playerId];

tsconfig.json

@@ -11,8 +11,7 @@
     "declarationMap": true,
     "sourceMap": true,
     "outDir": "./dist",
-    "rootDir": "./src"
   },
-  "include": ["src"],
-  "exclude": ["node_modules", "dist"]
+  "include": ["src", "test", "examples"],
+  "exclude": ["node_modules", "dist"],
 }