Atomic-Scale insights into hybridization and synergistic Catalysis of Ni-MoS2 and 2Ni-MoS2 for hydrocracking phenanthrene: A comprehensive study of Citric Acid-Directed NiS2 and MoS2 for selective Short-Chain monoaromatics and Malic Acid-Directed Ni-MoS2 and 2Ni-MoS2 for selective long-chain monoaromatics