doc updates needed

[allanbowe]

sasjs add and sasjs add cred/sasjs auth have an undocumented insecure option.
sasjs build does not have a syntax description.
sasjs compile doesn’t actually have a --output argument as specified in the docs.
sasjs run has an undocumented --compile option.
The arguments for sasjs request are --datafile and --configfile rather than --data and --config.