better inital parameters & bounds (where applicable)

- make use of new infrastructure of Efficiency
- greatly improved plotting
- added beta-quotient in SF plot

- add covariance matrix support
- add error band estimation by toys
- add support of explicit shift (also used by default)
- improved plotting

- mode calculation & shfiting
- Clopper-Pearson interval claculation & option to use it during plotting
- x axis vale generation

can be used to interactively (!) run local inference jobs on VISPA
does not include:
- HTCondor through DHI
- non interactive usage (bug in HTCondor: https://git.rwth-aachen.de/3pia/vispa/vispa-cluster/-/issues/285)