Added CHANGELOG.md

To track changelogs for releases

CHANGELOG.md

+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+
+
+## [1.6.0] - 2023-05-21
+
+### Added
+- CMake build support
+- Unit testing with Catch2 (#147)
+- Support for AABB and OBB obstacles in `dtTileCache` (#215, #278)
+- `dtTileCache` supports timesliced updates (#203)
+- Support for custom assertion functions (#250)
+- Variant of `findNearestPoly` that exposes distance and isOverPoly (#448)
+- `dtNavMeshQuery::getPathFromDijkstraSearch` gets a path from the explored nodes in a navmesh search (#211)
+- A version of `dtPolyQuery::queryPolygon` that operates on batches of polygons rather than just 128 (#175) (Fixes #107)
+- `rcNew`/`rcDelete` to match `rcAlloc`/`rcFree` (#324)
+- Better error reporting and input sanitization (#179, #303)
+- Better debug draw (#253, #254, #255, #256)
+- Improved docstrings, documentation
+- (RecastDemo) Load/Save navmesh data (#258)
+
+### Fixed
+- Improved robustness, speed and accuracy of navmesh point queries (#205, #208, #228, #231, #364, #381, #560)
+- Incorrect rasterization at tile borders (#476)
+- Off-mesh links in tiles were sometimes added twice (#202)
+- Potential heap corruption when collecting region layers (#214)
+- `findPath` returns `DT_OUT_OF_NODES` appropriately (#222)
+- Spans are filtered if there is just enough height (#626)
+- Increased epsilon in detour common segment polygon intersection test (#612)
+- Array overrun in `removeVertex` in `DetourTileCacheBuilder` (#601)
+- Potential rounding error computing bounding box size in `dtNavMesh::connectExtLinks` (#428)
+- An indexing error in updating agents in `DetourCrowd` (#450)
+- Allocation perf issues in rcVectorBase (#467)
+- Dead website links in comments
+- RecastDemo bugs (#180, #184, #186, #187, #200)
+- Uninitialized class member values, small memory leaks, rule-of-three violations, other minor issues
+
+### Changed
+- Updated stb_image (#184)
+- Updated stb_truetype (#183)
+
+### Removed
+- Use of _USE_MATH_DEFINES directive (#596)
+
+
+## [1.5.1] - 2016-02-22
+
+
+
+[unreleased]: https://github.com/recastnavigation/recastnavigation/compare/1.6.0...HEAD
+[1.6.0]: https://github.com/recastnavigation/recastnavigation/compare/1.5.1...1.6.0
+[1.5.1]: https://github.com/recastnavigation/recastnavigation/compare/1.5.0...1.5.1