feat: plugin marketplace #162

Job	Run time
E2E / Playwright E2E	4m 46s
Skit / Build	12m 59s
UI / Lint (TypeScript + ESLint)	32s
UI / Build	28s
Skit / Test	8m 48s
Plugins / Lint (Simple Plugins)	56s
Plugins / Format Check	19s
Skit / Lint (fmt + clippy)	4m 30s
Plugins / Lint (NLLB)	2m 3s
Plugins / Lint (Sherpa-ONNX Plugins)	53s
UI / Test	22s
Plugins / Lint (Whisper)	39s
All Checks Passed	3s
	37m 18s

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