[wip] experimental dumpers for print formatting (#67)

* [wip] add cat_dump()

* [wip] add catsep_dump

* [wip] add format_dump()

* [wip] add dump facilities

Author: biojppm

CMakeLists.txt

@@ -25,6 +25,7 @@ set(C4CORE_SRC_FILES
     c4/config.hpp
     c4/cpu.hpp
     c4/ctor_dtor.hpp
+    c4/dump.hpp
     c4/enum.hpp
     c4/error.cpp
     c4/error.hpp