Provide an odo alizer -o json command

[feloy]

odo should provide an alizer command with -o json flag, that will return the result of the alizer tool on the current directory.

$ odo alizer -o json
{
  "devfile": "go",
  "devfileRegistry": "StagingRegistry"
}

The caller will use the exit status of the command to get the error status. 0=> OK and (not 0) => Error

In case of error, the json output will be present in the stderr with the content:

{
  message: "..."
}

TODO:

• return list of matched stacks sorted by confidence (We need alizer to support returning multiple results sorted by confidence) #5806

[kadel]

As we discussed with people working on IDE plugins, this command should return all matches together with the score

[kadel]

/status blocked
We need alizer to support returning multiple results sorted by confidence

[rm3l]

BTW, I remember one comment from the past sprint demo was that alizer as a command did not seem obvious or self-descriptive. I think they suggested using something like odo identify or odo analyze. Shouldn't we rename this command as part of this issue? @kadel @feloy

[kadel]

Shouldn't we rename this command as part of this issue? @kadel @feloy

+1 for odo analyze