- units from properties specified in ddsim_steer.py
   already are in G4units, so no conversion needed

DDSim,Meta: Fix formatting for dict

The ddsim --meta.runNumberOffset command-line argument doesn't work
correctly (and similarly for event number).

On a machine running

```
LSB Version:    :core-4.1-amd64:core-4.1-ia32:core-4.1-noarch
Distributor ID: Scientific
Description:    Scientific Linux release 7.3 (Nitrogen)
Release:        7.3
Codename:       Nitrogen
```

I do

```
. /cvmfs/sw.hsf.org/key4hep/setup.sh
```

The then command

```
ddsim  --compactFile $LCGEO/FCCee/compact/FCCee_o1_v05/FCCee_o1_v05.xml -G -N10 --outputFile out.edm4hep.root --meta.runNumberOffset 735001  2>&1|tee log
```

eventually crashes with the error

```
Geant4UI         INFO  +++ EventAction> Install Geant4 control directory:/ddg4/EventAction/
Traceback (most recent call last):
  File "/cvmfs/sw.hsf.org/spackages7/dd4hep/1.23/x86_64-centos7-gcc11.2.0-opt/q4qtg/bin/ddsim", line 25, in <module>
    RUNNER.run()
  File "/cvmfs/sw.hsf.org/spackages7/dd4hep/1.23/x86_64-centos7-gcc11.2.0-opt/q4qtg/lib/python3.10/site-packages/DDSim/DD4hepSimulation.py", line 368, in run
    e4Out.RunNumberOffset = self.meta.runNumberOffset if self.meta.runNumberOffset > 0 else 0
TypeError: '>' not supported between instances of 'str' and 'int'
 *** Break *** segmentation violation
```

The arguments are never converted from strings to integers.
The change here fixes this.

Allow users to add track user information to G4 tracks, which then moves to Geant4Particle for saving

This adds the arguments `--gun.etaMin` and `--gun.etaMax`. If both
`thetaMin` and `etaMax` are specified, `etaMax has precedence.

/build/jenkins/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-01.25/src/DD4hep/01.25/DDG4/edm4hep/Geant4Output2EDM4hep.cpp:100:80: error: cannot pass object of non-trivial type 'const std::basic_string<char>' through variadic function; call will abort at runtime [-Wnon-pod-varargs]
        printout(DEBUG, "Geant4OutputEDM4hep", "Saving event parameter: %s", p.first);
                                                                               ^
/build/jenkins/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-01.25/src/DD4hep/01.25/DDG4/edm4hep/Geant4Output2EDM4hep.cpp:104:80: error: cannot pass object of non-trivial type 'const std::basic_string<char>' through variadic function; call will abort at runtime [-Wnon-pod-varargs]
        printout(DEBUG, "Geant4OutputEDM4hep", "Saving event parameter: %s", p.first);
                                                                               ^
/build/jenkins/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-01.25/src/DD4hep/01.25/DDG4/edm4hep/Geant4Output2EDM4hep.cpp:108:80: error: cannot pass object of non-trivial type 'const std::basic_string<char>' through variadic function; call will abort at runtime [-Wnon-pod-varargs]
        printout(DEBUG, "Geant4OutputEDM4hep", "Saving event parameter: %s", p.first);

If excited state is already known we get it via FindIon. Otherwise we use GetIon to create zero-state ions and print warnings for lvl>0

If we do not already store particles that become important'ish later we get a fatal error because the equilavent finding might not be able to find this particle

This logic only incurs a runtime overhead of two if checks if no particles are ever suspended.
Store non-primary particles that are suspended in a different map to pick their initial information up later again.

ParticleHandler: account for modified stacking actions, were tracking of a particle could be paused and later restarted.

Pick up the particle information that we have stored and go on from there

Add track momentum to the MonteCarloContribution of Geant4Hit structures. See issue https://github.com/AIDASoft/DD4hep/issues/1037

This makes sure a correct URI is passed to the documenthandler (XMLLoader)