discover-tests

• The discover_tests() command was added to support registering tests discovered at test time by ctest(1). It runs a user-provided discovery command, parses its output, and generates test names, arguments, and properties from regular-expression captures.

• Test drivers generated by the create_test_sourcelist() command now support the -N option to list all tests, one per line. This is useful in combination with the new discover_tests() command.