feat(parser): add getPaidMemberships() with PaidMemberships parser

[HitomaruKonpaku]

Summary

Adds Innertube.getPaidMemberships() that browses FEmemberships_and_purchases and returns typed data for all 3 sections.

Changes

7 parser classes: CardItemText, CardItemTextCollection, CardItemTextWithImage, ActivityItem, CardItem, CardItemContainer, ThemedImage

1 action class: UpdateCardItemOnClickCommand

2 youtube-level parsers: PaidMemberships, PaidPurchasesSection

Other: InnertubeError named export, OfferItem in IGNORED_LIST, ResponseReceived type alias

Usage

const yt = await Innertube.create({ cookie: '' })
const page = await yt.getPaidMemberships();

// Paginated purchases
let section = page.purchases;
while (section) {
  for (const item of section.items) console.log(item.title?.text?.toString());
  try { section = await section.getContinuation(); } catch { break; }
}

// Memberships
for (const m of page.memberships) console.log(m.channel_name, m.membership_level, m.price);
for (const m of page.inactive_memberships) console.log(m.channel_name, m.expired_date);

[absidue]

Before I waste anymore of my time reviewing what looks a lot like AI slop, could you please confirm whether a human even bothered to take a look at the changes before they were submitted?

[HitomaruKonpaku]

I reviewed and tested it myself yes