Player enhancements - Ability to have a playlist of all episodes in a season (or a custom list of episodes)

[vikrampm1]

As a followup to enhancements done in #272

It might be nice to enhance the player with the ability to have a playlist of all episodes in a season (or a custom list of episodes).

[jeffpaul]

Noting that with WordPress/gutenberg#50664 merged, we might want to iterate to utilize and build on top of that