Hudson’s annual hoopla of homegrown wearable art returns, bringing together the city’s diverse communities in a shared spectacle of the nonsensical. The Mad Hatters’ Parade is open to anyone. Come out and show off your handmade heterodox headwear, your ambulatory objets d’art, your bricollage berets! Sashay to the musical mischief of Brasskill, chime in with…