switch verb and context in commands

[timvink]

Now we have the verb first:

doing create issue
doing create pr
doing close pr
doing close issue
doing list
doing init
doing open issue
doing open pr

Probably a subset of doing users also use / are used to the github cli, which has the other order, f.e.:

gh issue create
gh issue close
gh issue list
gh pr ...

It's a more natural grouping of the commands, and I've notice in using doing that I actually already typed doing issue create once, probably because I first think of the thing I want to manipulate (issue) before what I want to do with it (create). It mainly applies to creating and closing, not so much the others.

Concretely, do:

• Implement doing issue create, doing issue close, doing pr create and doing pr close
• doing create issue, doing close issue, doing create pr and doing close pr
  • Write deprecation messages (print alternative + warn deprecation in v1)
  • Hide those commands from the --help output (https://click.palletsprojects.com/en/7.x/api/#commands)
  • Remove from documentation

[operte]

I find that the <verb> <item> makes more sense, but it feels mostly a matter of convention. To make adopting doing as easy as possible, we can change it to the <item> <verb> syntax, sure :)

The only advantage of the <verb> <item> <item_no> syntax that I see is that maybe in the future we could find a way to skip the <item> and just have <verb> <item_no> automatically figure out what type of <item> <item_no> relates to. That might be a bit more awkward to achieve on the <item> <verb> <item_no> syntax.