import { Command } from "https://deno.land/x/cliffy@v0.18.2/command/mod.ts";
Add a new option.
Parameters
Flags string like: -h, --help, --manual requiredArg:string [optionalArg: number] [...restArgs:string]
opts: ICommandOption<Partial<CO>, CA, Merge<CG, G>, PG, P> & { global: true; } | IFlagValueHandler
Flag options or custom handler for processing flag value.
Parameters
optional
opts: ICommandOption<Merge<CO, O>, CA, CG, PG, P> | IFlagValueHandler