DESIGN: Revisit / update multi feeds designs

[brandonhundt]

Design File: https://www.figma.com/file/5slWwMwrt20FnkZ1Z1xyJ5/publish-series-domain-mgmt?node-id=0%3A75

Now that we know more about Apple/Spotify paid subscription products, should look at revisiting the design to ensure assumptions are still valid would work with new use cases.

[brandonhundt]

Moving to review!

• Based on the components for adding Audio segments, but the accordion layout is new. Should also circle back to make audio segment appear in an accordion
• There should be a default feed for every series that is already available. Public, unlimited items, serving MP3s, All ad zones.
• When a new feed is created, all ad zones should be checked by default.
• We will need to move some of the "advanced settings" to individual feeds, unless it applies to ALL the feeds, like the "complete" checkbox.

Figma file: https://www.figma.com/file/5slWwMwrt20FnkZ1Z1xyJ5/publish-series-domain-mgmt?node-id=262%3A1520

[brandonhundt]

Update: Added Episode publish delay field. Based on numbers of days you want the episode to be published after the fact.

I'm open to alternative ways to present this field.