Add option to install() to pass parameters to package manager

[manuschillerdev]

I'd like to use mrm to set up pnpm monorepos.
pnpm will throw an error if you try to install dependencies at the workspace level without providing the -w or --workspace-root flag:

 ERR_PNPM_ADDING_TO_ROOT  Running this command will add the dependency to the workspace root, which might not be what you want - if you really meant it, make it explicit by running this command again with the -w flag (or --workspace-root). If you don't want to see this warning anymore, you may set the ignore-workspace-root-check setting to true.

I'd love to be able to pass extra flags to the package manager to circumvent that:

- install(["@commitlint/config-conventional", "@commitlint/cli"], {pnpm: true})
+ install(["@commitlint/config-conventional", "@commitlint/cli"], {pnpm: true, commandArgs: ["-w"])

[nirelbaz]

Could be helpful for me too :)

In the meantime I use this workaround:

install(['node-app'], { pnpm: true, dev: false }, (command, args, options = {}) => {
  args.push('--workspace');
  spawnSync(command, args, options);
});