[docs] Generate JSON file with supported boards

docs/build_json.py

@@ -0,0 +1,17 @@
+import json
+
+from ltchiptool import Board
+from update_docs import board_obj_sort
+
+boards = map(Board, Board.get_list())
+boards = list(sorted(boards, key=board_obj_sort))
+for i, board in enumerate(boards):
+    boards[i] = dict(
+        name=board.name,
+        title=board.title,
+        vendor=board.vendor,
+        mcu=board.family.short_name,
+    )
+
+with open("boards.json", "w") as f:
+    json.dump(boards, f)