feat: add publicdir for options

[JaeSeoKim]

Description

Added option for path public described in issue #165.

Additional context

I added publicDir options, is there any part that needs to be modified for additional next and tailwindcss plug-ins?

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
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• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).

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[martin2844]

Exactly what I was looking for!

[joe-bell]

Closing in favour of #212

(@JaeSeoKim please see my comment in #212 – I don't want your efforts to go unnoticed!)