Add script

Author: matteobachetti

pyproject.toml

@@ -118,6 +118,7 @@ HENlcurve = "hendrics.lcurve:main"
 HENmodel = "hendrics.modeling:main_model"
 HENphaseogram = "hendrics.phaseogram:main_phaseogram"
 HENphasetag = "hendrics.phasetag:main_phasetag"
+HENparfspec = "hendrics.parallel:main"
 HENplot = "hendrics.plot:main"
 HENpowercolors = "hendrics.power_colors:main"
 HENreadevents = "hendrics.read_events:main"