Police are looking at arming officers with weapons that stun suspects or entangle them in nets in a move that would bolster their response to protests in Hong Kong, the Post has learned.Security experts and rank-and-file officers said the plan would help plug gaps in the force’s arsenal and provide safer alternative to firearms, but human rights groups warned of the health risks, such as cardiac arrest.A senior police source said they had been comparing different models of electroshock devices…