Tidier character browsing

Browse by species and origin is tidier - we've cleaned up the lists you see when browsing characters by species or origin. Near-identical entries have been merged (so you'll see a single "Elf" rather than several almost-the-same versions), and a few groups that aren't really a species - peoples like the Noldor, or the Pahn Kahl - now show up as an origin instead, which is where they belong. Old links still work; they quietly send you to the right place.

Same-named origins are now easy to tell apart - some origins share a name across different worlds - "The North" exists in both A Song of Ice and Fire and the First Law world. They used to look identical with no way to choose the right one. Now the world is shown alongside, so "The North (The World of Ice and Fire)" and "The North (The First Law World)" are clearly distinct, both in the browse list and at the top of each origin's page.

A character filter fix - the "standalone" view on the character list was including some characters that didn't belong there. It now shows only characters whose appearances are genuinely in standalone books.

More consistent character details - we corrected a batch of character species and origins that had been stored inconsistently (for example small differences in spelling or capitalisation that split one group into several). Cast lists, character cards, and the browse pages now read more consistently as a result.