License and Documentation Improvements
This makes two modifications that are somewhat distinct.
[1] I have included a new script and CI job that will automatically check the repository for appropriate Copyrighting of all files. The CI now works because I have added Copyright to all files it checks.
[2] I have removed the automated doxygen building from the CI as that will be done automatically in the top level faser/daq repo as discussed here - https://gitlab.cern.ch/faser/daq/-/merge_requests/77
NOTE : This is more or less a clone of - !29 (closed) - but there was a broken job on the TLB check that I didn't want to debug so I took a fresh branch from master, which was not broken. @aagaard 's comment on that is addressed here.