[UX] Block charm on deployment with a message "This charm is NOT meant to be deployed as Juju application."

[taurus-forever]

Hi,

It is a UX proposal, this charm is not supposed to be deployed, but confusing results achieved if done by mistake:

ubuntu@juju3:~$ juju status
Model   Controller  Cloud/Region        Version  SLA          Timestamp
demo18  microk8s    microk8s/localhost  3.1.6    unsupported  18:07:42+01:00

App                 Version  Status   Scale  Charm               Channel  Rev  Address         Exposed  Message
data-platform-libs           waiting      1  data-platform-libs  stable    26  10.152.183.245  no       installing agent

Unit                   Workload  Agent  Address       Ports  Message
data-platform-libs/0*  unknown   idle   10.1.141.221  

Proposal: block charm with the information: This charm is NOT meant to be deployed as Juju application.

ubuntu@juju3:~$ juju status
Model   Controller  Cloud/Region        Version  SLA          Timestamp
demo18  microk8s    microk8s/localhost  3.1.6    unsupported  18:07:42+01:00

App                 Version  Status   Scale  Charm               Channel  Rev  Address         Exposed  Message
data-platform-libs           blocked      1  data-platform-libs  stable    26  10.152.183.245  no       This charm is NOT meant to be deployed as Juju application.

Unit                   Workload  Agent  Address       Ports  Message
data-platform-libs/0*  blocked   idle   10.1.141.221         This charm is NOT meant to be deployed as Juju application.

Low priority UX improvement.

[github-actions]

https://warthogs.atlassian.net/browse/DPE-2883