header redesign

[jackiehanyang]

Description

This pr supports a new header/UI look under a feature flag.

Get started page:

Dashboard page:

List page:

Detail page:

Create page:

Issues Resolved

[List any issues this PR will resolve]

Check List

• [x] New functionality includes testing.
  • [x] All tests pass
• [ ] New functionality has been documented.
• [x] Commits are signed per the DCO using --signoff

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[jackiehanyang]

Received UX designer signoff offline