Allow download of single episodes without subscribing to podcast

[iameru]

Checklist

• I have used the search function for open and closed issues to see if someone else has already submitted the same feature request.
• I will describe the problem with as much detail as possible.
• This request contains only one single feature, not a list of multiple (related) features.

App version

2.7.1

Where did you get the app from

Google Play

Problem you may be having, or feature you want

Currently there is no way to download episodes without subscribing.
This means usually

1. search for podcast name
2. subscribe
3. download the episode I want
4. unsubscribe

there is also no way to download from an url and add to queue.

Suggested solution

make it possible to download single episodes in the podcast preview modal without subscribing.
make it possible to add a file via link

the podcast should still appear in history and statistics.

Screenshots / Drawings / Technical details

No response

[ByteHamster]

Duplicate of #4710