refactor(WebSocketManager): passing in strategy (#9122)

* refactor(WebSocketManager): passing in strategy

* chore: update tests

* chore: requested nits

---------

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/ws/src/utils/constants.ts

@@ -2,6 +2,7 @@ import process from 'node:process';
 import { Collection } from '@discordjs/collection';
 import { lazy } from '@discordjs/util';
 import { APIVersion, GatewayOpcodes } from 'discord-api-types/v10';
+import { SimpleShardingStrategy } from '../strategies/sharding/SimpleShardingStrategy.js';
 import type { SessionInfo, OptionalWebSocketManagerOptions } from '../ws/WebSocketManager.js';
 import type { SendRateLimitState } from '../ws/WebSocketShard.js';
 
@@ -27,6 +28,7 @@ const getDefaultSessionStore = lazy(() => new Collection<number, SessionInfo | n
  * Default options used by the manager
  */
 export const DefaultWebSocketManagerOptions = {
+	buildStrategy: (manager) => new SimpleShardingStrategy(manager),
 	shardCount: null,
 	shardIds: null,
 	largeThreshold: null,