added beets-ydl

[catap]

Description

This is some proof of concept of missed beets plugin.

Anyway, this PR is blocked by:

• https://trac.macports.org/ticket/63478
• https://trac.macports.org/ticket/63481

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS x.y
Xcode x.y

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL?
• checked your Portfile with port lint?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?

[reneeotten]

@catap Please do not open draft PRs for things that depend on various Trac tickets that might or might not get resolved in the foreseeable future. I am trying to keep the PR queue moving along and this just adds unnecessary noise - please keep this locally for yourself and submit once it's possible to build this.

[catap]

@reneeotten let me close then!