`nerdctl build` should accept `--output <DIR`> as an alias of `--output type=local,dest=<DIR>`

[AkihiroSuda]

Description

nerdctl build should accept --output <DIR> as an alias of --output type=local,dest=<DIR>, as in docker build.

Steps to reproduce the issue

nerdctl build --output . .

Describe the results you received and expected

Received: error: invalid value . Expected: Should work as --output type=local,dest=$(pwd)

What version of nerdctl are you using?

nerdctl version 0.23.0-26-g67c0f59

Are you using a variant of nerdctl? (e.g., Rancher Desktop)

No response

Host information

No response

[Zheaoli]

I think this can be a good first issue? cc @AkihiroSuda

[yuchanns]

Assign me plz