feat(bridge): ZLevels Remastered in hello (PLAN_REDESIGNS §14.3.6)

Stage 7 of the §14.3 integration plan (D374): hello's integrations gains
zLevels { loaded, version }, sent again when ZLevels loads or unloads,
and rg.world prints zLevels=. No level is read or sent; its XP boosts
are permissions a run already lends.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

README.md

@@ -134,6 +134,10 @@ kept when the event ends: Guarded Crate has no way to end one event alone. Witho
 is refused, because the crate would land unguarded; and, as for Dangerous Treasures, a framework with
 `consolePlugins=False` cannot place one.
 
+nivex's `ZLevels Remastered` is optional, and the bridge only says whether it is loaded. Its levels are
+never read or sent. Its XP boosts are its own permissions (`zlevelsremastered.vip1` to `vip3`), so an
+event lends one as it lends any other permission, and it takes effect at once.
+
 Rust's own world events need no plugin at all. The patrol helicopter, Bradley, the cargo ship, the
 Chinook, airdrops, locked crates, the Travelling Vendor, the satellite and the Deep Sea reach the
 site's feed and its event triggers on every server, and an event can call one of them (`world.call`).