docs: update for PR #643 (death-screen New World/Same World now Overworld-only)
docs: correct World Type page for PR #639 (Overworld-only new-world creation) Removes the tag entry for Dungeon Train (Nether)/(End); also corrects a stale claim that the death-screen New World flow carries forward the same starting dimension — it actually rolls a fresh 94/5/1 Overworld/ Nether/End split independently (StartingDimension.rollRespawnDimension), unaffected by PR #639.
docs(features): document Dungeon Train (Nether) and (End) world types PR #105 added two new entries to the World Type dropdown that start the player and the auto-spawned train in the chosen dimension on first login. It also folded in a fix that skips pillar/stair placement when the entire footprint is over pure void (visible in the End start, where pillars used to anchor at the world floor and hang up through empty space). - Feature-World-Type.md: new "Starting in the Nether or End" section, updated changelog header and Files table - Features.md: updated index entry to mention dimension picker - Feature-Track-Generation.md: added pillar/stair void-skip note to the changelog header
docs(wiki): split Features into per-feature subpages Features.md now summarises each feature and links to a dedicated page. Detail content moves into nine Feature-*.md files, one per feature, so each feature is easier to link to and edit in isolation. No content is lost; cross-page links have been updated. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>