message: fix(commands): use PrefixType
diff: @@ -12,7 +12,7 @@ import {
  import { parseArgs } from '../utils/command.ts'
  import { Extension, ExtensionsManager } from './extension.ts'
  -type PrefixType = string | RegExp | (string | RegExp)[]
  +type PrefixType = string | RegExp | Array<string | RegExp>
  type PrefixReturnType = PrefixType | Promise<PrefixType>
  /** Command Client options extending Client Options to provide a lot of Commands-related customizations */
  @@ -58,7 +58,7 @@ export type CommandContextMiddlewareNext = () => unknown | Promise<unknown>
  * See InteractionsClient (`Client#slash`) for more info about Slash Commands.
  */
  export class CommandClient extends Client implements CommandClientOptions {
  - prefix: string | RegExp | (string | RegExp)[]
  + prefix: PrefixType
  mentionPrefix: boolean
  getGuildPrefix: (guildID: string) => PrefixReturnType
  