Replace boost::program_options with CLI11

boost::program_options is our last boost_dependency and should be replaced with CLI11. These changes apply to the daemon.cpp.

CLI11 is already used in the test harness (search for CLI in the tests/ directory).

Subtasks:

• make CLI11 in CMake globally available not just when tests are build.
• replace daemon program_options with CLI11 in daemon
• remove gkfs boost dependency alltogether