fix: getPayload node exits on webpack-hmr websocket failure (#9279)

### What?
When a script attempts to load payload using `getPayload()`, it will end
with: `Error: connect ECONNREFUSED 127.0.0.1:3000` etc...

### Why?

Even though there is a try/catch, it still errors because WebSocket
connection failures happen asynchronously after the ws object is
instantiated.

### How?

Added the error handling function cached.ws.onerror to prevent exit.

Author: DanRibbens

packages/payload/src/index.ts

@@ -1,6 +1,7 @@
 import type { ExecutionResult, GraphQLSchema, ValidationRule } from 'graphql'
 import type { Request as graphQLRequest, OperationArgs } from 'graphql-http'
 import type { Logger } from 'pino'
+import type { NonNever } from 'ts-essentials'
 
 import { spawn } from 'child_process'
 import crypto from 'crypto'
@@ -25,12 +26,6 @@ import type {
   SelectFromCollectionSlug,
   TypeWithID,
 } from './collections/config/types.js'
-
-import { generateImportMap, type ImportMap } from './bin/generateImportMap/index.js'
-export type { FieldState } from './admin/forms/Form.js'
-export type * from './admin/types.js'
-import type { NonNever } from 'ts-essentials'
-
 import type { Options as CountOptions } from './collections/operations/local/count.js'
 import type { Options as CreateOptions } from './collections/operations/local/create.js'
 import type {
@@ -72,6 +67,7 @@ import type { TypeWithVersion } from './versions/types.js'
 import { decrypt, encrypt } from './auth/crypto.js'
 import { APIKeyAuthentication } from './auth/strategies/apiKey.js'
 import { JWTAuthentication } from './auth/strategies/jwt.js'
+import { generateImportMap, type ImportMap } from './bin/generateImportMap/index.js'
 import { checkPayloadDependencies } from './checkPayloadDependencies.js'
 import localOperations from './collections/operations/local/index.js'
 import { consoleEmailAdapter } from './email/consoleEmailAdapter.js'
@@ -82,6 +78,9 @@ import { getLogger } from './utilities/logger.js'
 import { serverInit as serverInitTelemetry } from './utilities/telemetry/events/serverInit.js'
 import { traverseFields } from './utilities/traverseFields.js'
 
+export type { FieldState } from './admin/forms/Form.js'
+export type * from './admin/types.js'
+
 export interface GeneratedTypes {
   authUntyped: {
     [slug: string]: {
@@ -848,6 +847,10 @@ export const getPayload = async (
             }
           }
         }
+
+        cached.ws.onerror = (_) => {
+          // swallow any websocket connection error
+        }
       } catch (_) {
         // swallow e
       }