feat: add Moonshine STT native plugin with build system and marketplace integration #218

Job	Run time
UI / Test	24s
E2E / Playwright E2E	7m 5s
UI / Build	28s
Plugins / Format Check	18s
Skit / Test	11m 49s
Plugins / Lint (Sherpa-ONNX Plugins)	51s
Skit / Build	19m 25s
Skit / Lint (fmt + clippy)	6m 32s
Plugins / Lint (NLLB)	2m 2s
UI / Lint (TypeScript + ESLint)	35s
Plugins / Lint (Simple Plugins)	46s
Plugins / Lint (Whisper)	1m 27s
All Checks Passed	-1s
	51m 41s

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