The White House has been buzzing — and not just because of this week’s  high-profile state visit  from Britain’s King Charles III and Queen Camilla. The royal couple wrapped up their four-day U.S. visit Thursday with a formal farewell from President Donald Trump and first lady Melania Trump, and an unexpected highlight of the week centered on a distinctly sweet tradition: the  White House honey program. The first lady expanded the program just days before the monarchs’ visit, unveiling a new beehive designed to look like the White House on the South Lawn.  The White House honey program became a sweet highlight of King Charles III and Queen Camilla’s state visit. POOL/AFP via Getty Images The hive and the base were designed by White House staff and crafted by a Virginia artisan, according to the White House. It joins two existing hives that have been on the grounds since 2009 and can reportedly grow to roughly 70,000 bees in peak summer months, producing up to 225 pounds of honey annually.…