ORA-5.2.15

#1647 Integration of start page scss into roberta.css
#1542 Migrate Spike Prime Robot to Pybricks Firmware
#1651 add extensions for robot plugins to the lab
#1652 Link only works when the part with text in the button is hit, e.g. "export program"
#1654 Differentiate between data for exploring and learning in NN
#1643 Random/Zufallszahl 0.0 - 1.0 won't work because of integer division
#1655 Server Error after starting the simulation with an old xNN program
#1313 Integrate a Python linter for QC
#1639 Calli:bot - program has errors, can not compile
#1631 New Calliope V3 Plugin
#1656 Integrate robot Fischertechnik TXT 4.0
#1662 Edison and nn extensions are incompatible