alr-commands-init.adb: make alr init interactive

[Fabien-Chouteau]

Alr init will now queries the user for information such as license, description, tags, etc.

Non-interactive usage is still possible using existing switches.

[Fabien-Chouteau]

Something I forgot to mention in the commit is that non-interactive usage is still possible but it requires the -n switch.

Using only alr init --bin tests will not work automatically as it did before.

[mosteo]

So our test suite works because it was already using -n. OK.

Looks good in general, but I tried alr -nq init and I still get a lot of output. What if for scripting we mute the by-default-interactions too?

[Fabien-Chouteau]

I don't mind seeing the default value being used in the non-interactive logs. Do you mean a special case when both -n and -q are used?

[mosteo]

You're right that without -n, in this case -q does not make sense. But if the user does use both -n and -q, it seems counter-intuitive to show the mock interactions.

(But I realize we probably have other similar cases (e.g. alr publish) so I'll merge as-is and it can be a future enhancement.)