[FEATURE] notebook copy should include built-in resources

Use Case / Problem

My particular use-case (I could see many others) is to make a bunch of copies of a notebook, one for each participant in a Fabric training. Then they would have their own notebook to edit and run. I'm using the built-in resources component as part of the source notebook. When I use fab cp ... the copy of the notebook has empty built-in resources.

Proposed Solution

I'm not sure if it should be an additional argument or simply the standard behavior.

Alternatives Considered

No response

Impact Assessment

• This would help me personally
• This would help my team/organization
• This would help the broader fabric-cli community
• This aligns with Microsoft Fabric roadmap items

Implementation Attestation

• I understand this feature should maintain backward compatibility with existing commands
• I confirm this feature request does not introduce performance regressions for existing workflows
• I acknowledge that new features must follow fabric-cli's established patterns and conventions

Implementation Notes

No response