+ add SECoP logo resources (3 dark text, 1 light text)
+ Add logo to greeter
TODO: when there is a frappy-logo, replace this
Change-Id: I37eb8946d291b2f5dde0b5000251a4ac363fb01f
Reviewed-on: https://forge.frm2.tum.de/review/c/secop/frappy/+/30596
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Georg Brandl <g.brandl@fz-juelich.de>
Reviewed-by: Alexander Zaft <a.zaft@fz-juelich.de>