feat: use @stacklok/ui-kit

[alex-mcgovern]

This PR rewrites the UI to use the internal @stacklok/ui-kit component library — mainly to unlock a speed boost and avoid solving problems we have already solved (like dark mode).

[coveralls]

Pull Request Test Coverage Report for Build 12805902815

Details

• 20 of 26 (76.92%) changed or added relevant lines in 8 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.6%) to 68.977%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/api/generated/sdk.gen.ts	4	5	80.0%
src/features/dashboard/components/card-codegate-status.tsx	2	3	66.67%
src/components/Certificates.tsx	3	5	60.0%
src/components/ui/sidebar.tsx	0	2	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/components/ui/sidebar.tsx	1	58.91%

Totals
Change from base Build 12793870984:	-0.6%
Covered Lines:	399
Relevant Lines:	501

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💛 - Coveralls

[peppescg]

The copy to clipboard component is a very raw component, we need to replace it IMO, do we have it in ui-kit 🤔 ?

Anyways the issue here is the color, we need to replace it for dark theme