Transfer the app to platanus when created on heroku

[blackjid]

We can transfer the entire created pipeline with its apps.

heroku pipelines:transfer

[blackjid]

It would be nice not to have heroku@platan.us hardcoded in the code

[rjherrera]

There is a problem with this, as Heroku does not allow to transfer pipelines to users, only to teams. They do allow transfering individual apps, but the pipeline would have to be created again in the other account.