Add support for the Podcast Index chapters attribute 'toc'

[geekygecko]

Description

Internal reference: p1737627384554359/1737627371.981699-slack-C02A333D8LQ

The Podcast Index chapters spec has the attribute toc that we don't currently process. We should use it to hide any chapter that has toc set to false.

https://github.com/Podcastindex-org/podcast-namespace/blob/main/chapters/jsonChapters.md

toc (optional - boolean) If this property is present and set to false, this chapter should not display visibly to the user in either the table of contents or as a jump-to point in the user interface. It should be considered a "silent" chapter marker for the purpose of meta-data only. If this property is set to true or not present at all, this should be considered a normal chapter for display to the user. The name "toc" is short for "table of contents".

Step-by-step reproduction instructions

1. Play the episode 1728 - "Hatchet Man" - No Agenda
2. Open the full screen player
3. Tap chapters

Notice the following chapter appears, but it shouldn't.

Screenshots or screen recording

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Device, Operating system, and Pocket Casts app version

Google Pixel 9, Android 15, Pocket Casts 7.80