Document the new DPF surfaces in one command set, and test the field, half-tree, and multipoint edges.

Co-authored-by: Cursor <cursoragent@cursor.com>

include/dpf/setbit_index_iterable.hpp

@@ -1,6 +1,5 @@
 /// @file dpf/setbit_index_iterable.hpp
-/// @brief
-/// @details
+/// @brief Iterates the positions of set bits in a bit array.
 /// @author Ryan Henry <ryan.henry@ucalgary.ca>
 /// @copyright Copyright (c) 2019-2024 Ryan Henry and [others](@ref authors)
 /// @license Released under a GNU General Public v2.0 (GPLv2) license;