[Feature]: Add flag to preserve metadata

[SalOne22]

Description

For now all metadata tags are stripped to reduce resulting image size. This can cause issues with specific tags such as with ICC profile that can loss in quality after transform.

Problem or Motivation

No response

Expected behavior

Add --preserve tag to preserve metadata on supported codecs. Codecs that do not support metadata (such as avif) should apply that metadata tags to preserve image appearance.

Alternatives Considered

Another solution is to preserve image metadata by default and provide --strip flag that will apply all required transformations.

Anything else?

No response