[wip] Push whole application package

[eunomie]

- What I did

Rewrote docker app push to push the application package with all that is needed:

• service images
• invocation image
• bundle

The whole application needs to be built before, using docker app build.

The new push command doesn't take any flag, so:

• you need to tag your application before to push, when building or using docker app image tag
• you cannot indicate which platform you target, do it during the build phase

- How I did it

Most of the command has been rewritten to get ride of all unused flags and behaviors.

- How to verify it

- Description for the changelog

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@90d8144). Click here to learn what that means. The diff coverage is 70.53%.

@@            Coverage Diff            @@
##             master     #679   +/-   ##
=========================================
  Coverage          ?   72.25%           
=========================================
  Files             ?       56           
  Lines             ?     2808           
  Branches          ?        0           
=========================================
  Hits              ?     2029           
  Misses            ?      521           
  Partials          ?      258

Impacted Files	Coverage Δ
internal/commands/image/tag.go	87.5% <100%> (ø)
internal/commands/push.go	68.54% <69.44%> (ø)

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