Support build multi-page-app to saparate dir

[STofone]

Description

The multi-page-app only supports output to one dir currently.

Suggested solution

Support build multi-page-app to saparate dir.
It helps when independent deployment is needed.

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[bluwy]

Can you elaborate by a separate directory? Shouldn't outDir support this?

[sapphi-red]

Closing due to lack of response