feat: plugin marketplace #166

Job	Run time
Skit / Build	13m 34s
Skit / Test	8m 0s
Plugins / Format Check	22s
E2E / Playwright E2E	5m 15s
UI / Test	20s
Plugins / Lint (Simple Plugins)	31s
Plugins / Lint (Whisper)	50s
UI / Lint (TypeScript + ESLint)	41s
Plugins / Lint (Sherpa-ONNX Plugins)	50s
UI / Build	29s
Plugins / Lint (NLLB)	1m 58s
Skit / Lint (fmt + clippy)	5m 55s
All Checks Passed	3s
	38m 48s

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