Add QuarkPhysics (soft body physics engine) (fffaraz#1608)

Author: toge

README.md

@@ -980,6 +980,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [PlayRho](https://github.com/louis-langholtz/PlayRho) - An interactive physics engine & library.  [Zlib]
 * [Project Chrono](https://github.com/projectchrono/chrono) - An open source multi-physics simulation engine. [BSD-3-Clause] [website](https://projectchrono.org/)
 * [Quantum++](https://github.com/vsoftco/qpp) - A modern C++11 quantum computing library. [MIT]
+* [QuarkPhysics](https://github.com/erayzesen/QuarkPhysics) - A 2D Soft Body and Rigid Body Physics Engine. [MIT]
 * [Simbody](https://github.com/simbody/simbody) - High-performance C++ multibody dynamics/physics library for simulating articulated biomechanical and mechanical systems like vehicles, robots, and the human skeleton. [Apache2]
 * [SOFA](https://github.com/sofa-framework/sofa) - SOFA is an open-source framework targeting at real-time simulation, with an emphasis on medical simulation. [LGPL] [website](https://www.sofa-framework.org)