Move CLI parser to its own component

[tomadamatkinson]

The CLI parser is self contained and is the sole reason why we have the cli11 third party. This can be directly moved to its own component

[mjbmon]

I strongly support this, but then you need to document in the build instructions that cli11 is a dependency that needs to be installed.

[SaschaWillems]

Do we still want to do this? Imo the current CLI parser works just fine.

[marty-johnson59]

@tomadamatkinson, can we close this or is there more to do?