- Use the field map and beamline magnetic fields as defined via compact
detector description.
- There is probably a better implementation but this is the most direct.

Added new algorithm which takes 4 collections and copies into a single
ouput collection
	modified:   ../../CMakeLists.txt
	new file:   TrackingHitsCollector.cpp

	modified:   README.md
	modified:   doc/page.dox

- should end up at eic.phy.anl.gov/juggler

	modified:   .gitlab-ci.yml
	modified:   README.md
	new file:   doc/Doxyfile
	new file:   doc/doxygen-awesome-sidebar-only-darkmode-toggle.css
	new file:   doc/doxygen-awesome-sidebar-only.css
	new file:   doc/doxygen-awesome.css
	new file:   doc/doxygen-custom/custom.css
	new file:   doc/doxygen-custom/footer.html
	new file:   doc/doxygen-custom/header.html

 - using cxx17 by default
 - put eicd in main cmake file.

	modified:   CMakeLists.txt