[Features] Replace youtube-dl-exec with our own stream module

[Mednoob]

Apparently, when some of our users trying to install modules for Rawon the NPM doesn't install youtube-dl-exec. Why? because they don't have Python on their machine. "But you already added play-dl alternative right? So what's the problem?" The problem is that when they're trying to build the project, youtube-dl-exec is trying to be imported in the YTDLUtils.ts by ESLint. Then, yes as you might've thought, since youtube-dl-exec is not installed on their machine ESLint detect it as any. This leads to ESLint error. So, the alternative that I come up with is that we move youtube-dl-exec into a single stream module file so that the YTDLUtils can still get the types of the stream module.

[Mednoob]

Feature added in commit c65d96e