implement subcommand to create seccomp profile

[alegrey91]

The idea is to create a subcommand like the following:

harpoon produce -t=seccomp

This new feature should give the ability of creating a seccomp profile by combining together all the syscalls collected with the command capture.
The subcommand name should be something like produce/generate/cook.
Additionally, I was thinking to add the flag -t/--type in case we want to support different types like systemd services (that make use of seccomp as well with the following label SystemCallFilter=.