Refactor item property parsing and centralize utility functions

- Moved `parseItemProps` function to `core/utils.ts` for reuse across modules.
- Updated various services to import and utilize the centralized `parseItemProps`.
- Introduced new utility functions for handling consumable cooldowns and healing calculations.
- Enhanced mob management with a new repository system, allowing for dynamic loading and validation of mob definitions from the database.
- Added admin functions for creating, updating, listing, and deleting mobs, with validation using Zod.
- Implemented tests for mob management functionalities.
- Improved error handling and logging throughout the mob and consumable services.

scripts/testMobData.ts

@@ -0,0 +1,18 @@
+import {
+  initializeMobRepository,
+  getMobInstance,
+  listMobKeys,
+} from "../src/game/mobs/mobData";
+
+async function run() {
+  console.log("Initializing mob repository...");
+  await initializeMobRepository();
+  console.log("Available mob keys:", listMobKeys());
+  const inst = getMobInstance("slime.green", 3);
+  console.log("Sample slime.green @ lvl3 ->", inst);
+}
+
+run().catch((e) => {
+  console.error(e);
+  process.exit(1);
+});