feat(route/pixiv): refactor novels api and add series support (#17532)

* feat(route/pixiv): refactor novels api and add series support

* chore: cleanup

* Update lib/routes/pixiv/novel-api/series/nsfw.ts

Co-authored-by: Tony <[email protected]>

* Update lib/routes/pixiv/novel-api/series/sfw.ts

Co-authored-by: Tony <[email protected]>

* Update lib/routes/pixiv/novel-api/user-novels/nsfw.ts

Co-authored-by: Tony <[email protected]>

* Update lib/routes/pixiv/novel-api/user-novels/nsfw.ts

Co-authored-by: Tony <[email protected]>

* Update lib/routes/pixiv/novels.ts

Co-authored-by: Tony <[email protected]>

* Update lib/routes/pixiv/series.ts

Co-authored-by: Tony <[email protected]>

* refactor: rename pixiv/series to pixiv/novel/series

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