v1.1.0

Additions only: every 1.0 result and saved format is unchanged, and 1.0 data loads as before.

Added

• NavMesh.Save/TrySave/GetSaveSize and NavMesh.Load, NavWorld.Save/TrySave/GetSaveSize and NavWorld.Load: a baked tier-1 mesh (or a world of agent classes) saves to bytes and loads back as a tier-1 NavMesh/NavWorld, with Settings, CreateCrowd, CreateStreamer, FindPathAsync and the query members working, and the same bits from every query. The bytes are a small envelope (ONNM, ONNW) around the unchanged version 2 mesh bytes and carry the NavSettings; Load(bytes, settings) also takes bare NavMeshSerializer.WriteMesh bytes, checking the settings against the mesh's build fingerprint (NavMeshFingerprintException on a mismatch). Layout in docs/navmesh-format.md; new fixtures under Fixtures/1.1.0; a fuzz target navmesh-load.
• Crowd.TryAdd: like Add, but returns false instead of throwing when no walkable polygon is near the position or the crowd is full. Add is unchanged. The one policy for positions off the mesh is written down in docs/path-results.md.
• NavMesh.Build(ReadOnlySpan<float> vertices, ReadOnlySpan<int> indices, NavSettings?): single-precision input, as engines and System.Numerics arrays hold it. The float to double step is exact, so the mesh is byte-equal to the double overload's on the same values.
• DefaultQueryFilter, a struct IQueryFilter that accepts every polygon at cost 1 and gives exactly the results of new QueryFilter(), so the allocation-free span FindPath<TFilter> needs no user-written filter.
• Grid.FindPathWithPoints(Cell, Cell, ...): the cell form of FindPath with GridPath.Points filled with the world-space cell centres through Grid.Space, so Length is a number instead of NaN. FindPath(Cell, Cell) is unchanged.
• docs/migrating.md: concept, type and unit tables for moving from Recast, Detour, DotRecast and Unity's navigation, and the note that their mesh bytes must be re-baked.

Changed

• Error messages of AgentOptions.Validate, CrowdOptions.Validate and FollowerOptions.Validate now state the allowed range (SeparationWeight must be 0 to 1.); the setters of HpaOptions and OrcaSimulator.MaxThreads report their own property name as ParamName instead of value. Exception types are unchanged.