Mock up badges for certification scheme

We are developing a certification scheme for SCI scores.

See proposal doc here: https://docs.google.com/document/d/1aMY7LaeA0LR3UJ0eSm2GM0k9L2TSx9db6VURErN-584/edit?tab=t.0

We need images that can be used as badges, signifying that a measurement was certified. There are expected to be several tiers of certification:

- Self-certification
- Community certification
- GSF certification
- Gold certification

Wording, if present, should be something along the lines of

SCI Self Certified
SCI Community Certified
SCI GSF certified
SCI Certified (Gold)

In terms of design, I'm open to any suggestions - it should be recognizable as a GSF asset, identifiable even when displayed in a small size, and clearly a badge/rosette/award.

Start by reading the linked proposal document alongside this issue to understand the SCI certification scheme and tier requirements. Produce badge concepts for the four certification levels that remain recognizable at small sizes, identify the GSF asset clearly, and communicate each certification wording.

Written by the indexing model from the issue text.