feat: add Deepgram audio transcription

Co-authored-by: Safzan Pirani <safzanpirani@users.noreply.github.com>

src/media-understanding/providers/deepgram/index.ts

@@ -0,0 +1,8 @@
+import type { MediaUnderstandingProvider } from "../../types.js";
+import { transcribeDeepgramAudio } from "./audio.js";
+
+export const deepgramProvider: MediaUnderstandingProvider = {
+  id: "deepgram",
+  capabilities: ["audio"],
+  transcribeAudio: transcribeDeepgramAudio,
+};