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/tsup.config.ts

@@ -1,11 +1,11 @@
 import { defineConfig } from 'tsup'
 
 export default defineConfig({
-    entry: ['src/index.ts'],
+    entry: ['src/index.ts', 'src/testing/index.ts'],
     format: ['esm'],
     dts: true,
     clean: true,
     sourcemap: true,
-    external: ['ws', '@esengine/rpc'],
+    external: ['ws', '@esengine/rpc', '@esengine/rpc/codec'],
     treeshake: true,
 })