~/.pi/pi-gitnexus.json is ignored for setting the command path

[90-008]

in onSession:

const flag = pi.getFlag('gitnexus-cmd') as string | undefined;
const cmdStr = flag ?? saved ?? 'gitnexus';

here getFlag returns the default gitnexus (the flag is registered with that as a default) and the rest of the statement is ignored, so the config file is never used.