feat: add private office media signaling

server/src/media/index.ts

@@ -0,0 +1,8 @@
+export {
+  createMediaSignalService,
+  type MediaSignalFailureCode,
+  type MediaSignalResult,
+  type MediaSignalService,
+  type MediaSignalServiceOptions,
+} from "./service.ts";
+export { bundledMediaOffice, officeHasMediaBinding } from "./bindings.ts";