Feat: direct quartic extension on koala and baby bears fields

[yelhousni]

Description

This PR implement the arithmetic of direct quartic extensions on koala and baby bears fields. It might become handy for cross testing and/or hinting in gnark circuit version.

Type of change

• New feature (non-breaking change which adds functionality)

How has this been tested?

Test between direct and towered extensions implemented.

How has this been benchmarked?

N/A

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I did not modify files generated from templates
• golangci-lint does not output errors locally
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules