Release the native navmesh resources a plugin holds: the navmesh query, the navmesh, and the tile cache (if
one was built). These are Detour objects living on the wasm heap — they are NOT reclaimed by JS garbage
collection, so dropping the plugin reference alone leaks them. Call this when a navmesh is rebuilt or a
plugin is discarded. Idempotent and safe on a plugin that never built a navmesh.
Release the native navmesh resources a plugin holds: the navmesh query, the navmesh, and the tile cache (if one was built). These are Detour objects living on the wasm heap — they are NOT reclaimed by JS garbage collection, so dropping the plugin reference alone leaks them. Call this when a navmesh is rebuilt or a plugin is discarded. Idempotent and safe on a plugin that never built a navmesh.