pause game action, and movetask endpoint fix
	modified:   LibreSTR/AssetManager.cpp
	modified:   LibreSTR/AssetManager.h
	modified:   LibreSTR/CMakeLists.txt
	modified:   LibreSTR/GameObject.cpp
	modified:   LibreSTR/GameObject.h
	modified:   LibreSTR/GameState.cpp
	modified:   LibreSTR/GameState.h
	new file:   LibreSTR/actions/PauseGameAction.cpp
	new file:   LibreSTR/actions/PauseGameAction.h
	modified:   LibreSTR/units/MoveTask.cpp
	modified:   LibreSTR/units/MoveTask.h
	modified:   assets/assets.def
readme update
	modified:   README.md