feat: add Moonshine STT native plugin with build system and marketplace integration #219

Job	Run time
UI / Build	29s
UI / Test	26s
Skit / Test	10m 48s
Skit / Build	18m 13s
E2E / Playwright E2E	6m 27s
Skit / Lint (fmt + clippy)	5m 58s
Plugins / Format Check	16s
UI / Lint (TypeScript + ESLint)	34s
Plugins / Lint (NLLB)	2m 14s
Plugins / Lint (Sherpa-ONNX Plugins)	53s
Plugins / Lint (Simple Plugins)	33s
Plugins / Lint (Whisper)	1m 15s
All Checks Passed	0s
	48m 6s

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