Hong Kong police arrested the founder of a banned pro-independence group during a raid on an industrial building on Thursday while in a separate operation, a family of three was detained after dozens of smoke bombs were found in their home.Andy Chan Ho-tin, founder of the outlawed Hong Kong National Party, was among eight arrested in Haribest Industrial Building on Au Pui Wan Street in Sha Tin.The group comprised seven men and a woman, detained over offences including possession of explosives…