The long arm of the law gets a big embrace. Thousands of New York’s Finest packed Madison Square Garden Saturday night for a free, star-studded concert honoring their service in a spirited push to boost morale across the force – an inaugural event set to become an annual tradition. The “Thank You, NYPD ” concert – spearheaded by MSG Entertainment CEO and executive chairman James Dolan – welcomed over 15,000 police officers and civilian employees, along with their families, to be entertained by