refactor streamer to use stream providers (e.g. to plugin web torrent)

src/Streamer/ReadStreamProvider/read-stream-creatable-provider.interface.ts

@@ -0,0 +1,7 @@
+import { FileEntity } from '../../VideoFiles/Entity/file.entity';
+import { ReadStreamCreatable } from '../Interface/read-stream-creatable.interface';
+
+export interface ReadStreamCreatableProviderInterface {
+  supports(fileEntity: FileEntity): boolean;
+  getReadStreamCreatable(fileEntity: FileEntity): Promise<ReadStreamCreatable>;
+}