Reorganize runner

[alecandido]

At the moment, runner was more or less the core of EKO, despite us calling it "more a library than an application".

We should collect all stuffs related to runner, and improve it, also in consideration of the new runner coming from #138

• write runcards objects, currently sketched in runner.runcards Runcards Dataclasses #153
• the new runcard objects should be used, where now the dictionary runcard is passed
  • only the required information has to be passed, and nothing more (absolutely not the full runcard)
  • thus use the default object constructors, dropping the from_dict (incidentally, this will close Exterminate from_dict #114)
• move run_dglap() out of top level, and scope in runner (if it is more a library, then there is no special reason the only object define top level should be the runner)
  • we can still export to the top scope for compatibility
• inherit also runcards object from output.struct.DictLike, since they are the objects mostly going to and from dictionary (because of serialization)
  • as a consequence, we should also move DictLike out of the output subpackage (as a rule of thumb, since subpackages are made to collect and isolate, they should not talk to each other, but only with the upper scope)

Closes #153

[felixhekhorn]

Can we please drop ade4abf and d2eb93c from here and put them in a separate PR - they're changing everything which makes this PR unreadable (and they got nothing to do with this - in fact, the tasks in here are already highly non-trivial on their own)

[alecandido]

Can we please drop ade4abf and d2eb93c from here and put them in a separate PR - they're changing everything which makes this PR unreadable (and they got nothing to do with this - in fact, the tasks in here are already highly non-trivial on their own)

Indeed, I noticed and cherry-picked to develop

EDIT: cherry-picked and rebased, such that this is back to the single commit it was

[alecandido]

Deprecated in favor of #172