Import user's Bandcamp collection

[fynngodau]

Checklist

• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• This issue contains only one feature request. I will open one issue for every feature I want to request.

Describe the feature you want

Users should be able to import, according to their wishes, either their collection (list of purchased items) or their wishlist (list of items that they bookmarked) from Bandcamp into NewPipe. In addition, they should be able to import the artists that they follow.

The first two could be added as a playlist. The latter should be added as subscriptions.

Is your feature request related to a problem? Please describe it

No

Additional context

If the collection of a user is public, all that's required to access it on the web is their username. Same applies for artists they are following.

How will you/everyone benefit from this feature?

Users like using NewPipe more when they can access their previously compiled list of favorite items on Bandcamp.