[logparser] Add readme

docs/examples/howto_logparser/README.rst

+How to use the OGS log parser
+=============================
+
+.. sectionauthor:: Tobias Meisel (Helmholtz Centre for Environmental Research GmbH - UFZ)
+
+The following jupyter notebooks provide some examples of how to use the log parser.

docs/examples/howto_logparser/plot_logparser_analyses.py

@@ -9,6 +9,7 @@ We uses the project file from the following benchmark:
 `<t_end> 1e8 </t_end>`
 and for the staggered scheme the variant taken from
 `Tests/Data/Parabolic/HT/StaggeredCoupling/HeatTransportInStationaryFlow/HeatTransportInStationaryFlow.prj`
+
 """
 
 # %%