[Feature Request] Save podcast to Nextcloud, rather than download to desktop [$15]

[sunjam]

• I have read the CONTRIBUTING.md and followed the provided tips

Is your feature request related to a problem? Please describe.
When listening to a podcast, there is a general download option on the right hand side of the player, but no option to save the podcast within Nextcloud.

Describe the solution you'd like
Not high priority, but the option to save podcasts into Nextcloud file system from the News webui.

Describe alternatives you've considered

• I considered starring, but there is no option to star a podcast once it begins playing and you browse to another news item. At that point you must look back through read items in order to add the star, which might not be displayed by default.
• Another option is to download via a browser, but this can have different levels of difficulty on desktop or mobile devices... I only find myself wanting to download podcasts directly into Nextcloud since it is my file sync service.

Thanks for your great work!

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