Coordinated and comprehensive planning by all levels of government within the State of Georgia is of vital importance to the state and its citizens. The state has an essential public interest in promoting, developing, sustaining, and assisting coordinated and comprehensive planning by all levels of government. This article is intended to provide for the coordination of planning, at the direction of the Governor, by departments, agencies, commissions, and other institutions of the state, and this article shall be liberally construed to achieve that end.