Add Anime and Real sources to /buttplug

[SyntaxGhost404]

What changed

• adds the shared optional style choice to /buttplug, with Anime routed only to the existing N-SFW/ABD endpoint and Real routed only to PornPics
• preserves the same no-option shuffled pool and fallback behavior used by /ass and /anal
• adds a bounded PornPics category-feed provider that samples the documented 1,000-item index in one request
• extracts only gallery-card thumbnails, never enters a gallery, and promotes /300/ or /460/ CDN paths to /1280/
• validates feed, gallery, and CDN hosts before exposing URLs and keeps media binary fetching client-side
• updates provider/command documentation and legacy-parity handling

Why

The command was a flat, Anime-only ABD source, so Discord did not expose Anime/Real selection and had no real-human media provider.

User impact

Explicit Anime and Real selections stay exclusive and persist across Refresh. With no selection, both groups participate in the existing randomized source/fallback logic.

Validation

• npm run validate
• static checks passed
• 129 tests passed, including exclusive option routing, Refresh state, exact offset selection, feed-only DOM extraction, host rejection, and 1280px URL promotion

A bounded live metadata smoke request from the managed development environment received PornPics' Site Unavailable response, so deployment-host access to the upstream category feed remains environment-dependent; no gallery page or CDN binary was requested during that check.