+ mol: add compile test infrastructure

bs/setup.cmake

src/cpp/include/mol/compile_test.hpp

src/cpp/include/mol/dependent_false.hpp

src/cpp/include/mol/detail/compile_test.hpp

src/cpp/include/mol/detail/dependent_false.hpp

src/cpp/include/mol/detail/test_name.hpp

test/CMakeLists.txt

test/compile/CMakeLists.txt

test/compile/cpp/CMakeLists.txt

test/compile/cpp/mol/false_false.t.cpp

test/compile/cpp/mol/false_true.t.cpp

test/compile/cpp/mol/true_false.fail.t.cpp

test/compile/cpp/mol/true_true.t.cpp