feat(framework): server testing utils, transaction storage simplify, pathfinding tests (#384)

## Server Testing Utils
- Add TestServer, TestClient, MockRoom for unit testing
- Export testing utilities from @esengine/server/testing

## Transaction Storage (BREAKING)
- Simplify RedisStorage/MongoStorage to factory pattern only
- Remove DI client injection option
- Add lazy connection and Symbol.asyncDispose support
- Add 161 unit tests with full coverage

## Pathfinding Tests
- Add 150 unit tests covering all components
- BinaryHeap, Heuristics, AStarPathfinder, GridMap, NavMesh, PathSmoother

## Docs
- Update storage.md for new factory pattern API

packages/framework/server/package.json

@@ -10,6 +10,10 @@
     ".": {
       "import": "./dist/index.js",
       "types": "./dist/index.d.ts"
+    },
+    "./testing": {
+      "import": "./dist/testing/index.js",
+      "types": "./dist/testing/index.d.ts"
     }
   },
   "files": [
@@ -21,7 +25,9 @@
     "build:watch": "tsup --watch",
     "dev": "tsup --watch",
     "type-check": "tsc --noEmit",
-    "clean": "rimraf dist"
+    "clean": "rimraf dist",
+    "test": "vitest run",
+    "test:watch": "vitest"
   },
   "dependencies": {
     "@esengine/rpc": "workspace:*"
@@ -35,6 +41,7 @@
     "rimraf": "^5.0.0",
     "tsup": "^8.0.0",
     "typescript": "^5.7.0",
+    "vitest": "^2.0.0",
     "ws": "^8.18.0"
   },
   "publishConfig": {