Improve OpenModelica support of ThermoSysPro

Since ThermoSysPro has been developed mainly with Dymola, ensure that the library is fully supported by OpenModelica (compliancy with official Modelica spec, graphical annotations, ...).

Useful material and hints can be found here:

https://trac.openmodelica.org/OpenModelica/wiki/WritingCompliantLibraries

https://openmodelica.org/doc/OpenModelicaUsersGuide/latest/porting.html

added CI/OpenModelica enhancement labels

changed the description

marked this issue as related to #71 (closed)

marked this issue as related to #70 (closed)

added Phimeca label

marked this issue as related to #74

created branch 73-improve-openmodelica-support-of-TSP to address this issue

mentioned in commit 474ba8db

marked this issue as related to #106

added DevComAdvice OSMC labels

changed milestone to %ThermoSysPro v4.2