Added deprecated ROOT library - geocad

• ROOT dropped geocad from their code base, which some npdet tools were using. This was copied to npdet and added to a new library.
• Added geocad library build
• New cmake flag USE_GEOCAD is automatically set if OpenCascade is found.
• Executable under tools, npdet_to_step is now available again.
• The geocad related tools still need to be fully debugged as the version of opencascade has changed since it was removed from ROOT.

.gitlab-ci.yml

-image: eicweb.phy.anl.gov:4567/containers/eic_container/eic:2.5-stable
+image: eicweb.phy.anl.gov:4567/containers/eic_container/eic:2.6-stable
 
 stages:
   - build