Document and fix addons setup-cli -f option

[patryk-kozak]

There is a possibility to force install plugins without an interactive prompt which is problematic on for example CI.

This -f parameter is undocumented. It would be good to document it to show how this can be leveraged in some cases.

genesis do dev -- setup-cli vs genesis do dev -- setup-cli -f

Also, the setup-cli does not handle the input stream to pass the interactive prompt, so -f is the only option to run it non-interactively.

Any effort to pass answers to interactive prompt fails on the same error:

echo "y" | genesis do dev -- setup-cli
Failed to load /home/ubuntu/deployments/cf/.genesis/config: 

genesis do dev -- setup-cli << A
> y
> A
Failed to load /home/ubuntu/deployments/cf/.genesis/config: 

Code ref:

cf-genesis-kit/hooks/addon

Line 81 in aff0dd8

cmd+=( -f )