rename brave_new_world -> brave_new_world_(webtoon)

BUR #30107 has been approved by @nonamethanks.

rename brave_new_world -> brave_new_world_(webtoon)
deprecate brave_new_world

Ambiguous with Huxley's novel Brave_New_World_(book), might as well deprecate the title while we're at it since the original novel already has a qualifier.

The bulk update request #30107 (forum #298832) has been approved by @nonamethanks.

Makes sense to me — the rename clears up confusion with Huxley’s novel, and adding the _(webtoon) qualifier keeps it consistent with other entries. Helps a lot for users who just want to read manhwa online without stumbling into unrelated tags. Good call!

Just post the spam link already.