feat: supertonic tts plugin #173

Job	Run time
UI / Test	25s
UI / Lint (TypeScript + ESLint)	34s
Plugins / Lint (Whisper)	42s
E2E / Playwright E2E	5m 7s
UI / Build	25s
Plugins / Lint (Simple Plugins)	41s
Skit / Lint (fmt + clippy)	5m 15s
Skit / Build	13m 10s
Skit / Test	11m 12s
Plugins / Lint (NLLB)	2m 9s
Plugins / Format Check	16s
Plugins / Lint (Sherpa-ONNX Plugins)	48s
All Checks Passed	3s
	40m 47s

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