Nitrokey
add signal handling
If you start the application from a terminal and press the key combination ctrl+c in this terminal, the application will now be closed.
Closes #132
The signal.signal() function can be used to define your own handlers that are executed when a signal is received.
SIGINT is a standard handler that translates a keyboard interrupt
SIG_DFL ensures that ctrl+c is recognized to close the program
ok, also crosschecked SIG_DFL which essentially tells the kernel to handle SIGINT as is - which means that qt6 is disabling this behavior by default - ok, why not ;)
on the other side, I could test this successfully - think this should be good for now.
Could we also disable this behavior during runtime ? Means, as of now one could likely kill the nitrokeyapp during an update operation, which would brick the device - I am not sure if we should introduce this if this could happen...