Team India, set to enter a transition phase in the next three years, will do so under their youngest-ever Indian coach — 42-year-old Gautam Gambhir. More than a month after guiding Kolkata Knight Riders to an IPL title, the Board of Control for Cricket in India (BCCI) appointed the former India opener as their new head coach on Tuesday. Gambhir’s three-and-a-half year tenure will begin with the limited-overs tour to Sri Lanka, which begins on July 27. Gambhir’s appointment has largely come along expected lines after it became clear that…