Here’s an entirely new take on the familiar city of Rio de Janeiro. The gentrifying, bohemian Santa Teresa district is an exception among Rio’s most desirable neighborhoods, in that it’s high up on the hillside rather than down along the beach. This is a district full of colonial mansions and artists’ workshops, with charming little boutiques rather than luxury-brand showrooms. The top hotel in Santa Teresa is, well, the Santa Teresa — specifically, Hotel Santa Teresa Rio MGallery by…