Delete all project and just depend on paas-charm

[javierdelapuente]

Applicable spec:

Overview

This PR is related to the rename of paas-app-charmer to paas-charm. For that, all the project is deleted, and there is just a dependency on paas-charm<2.

The related PR for the new project is here: canonical/paas-charm#5

Rationale

It is required to rename the project to a more meaningful name, paas-charm.

Juju Events Changes

Module Changes

Library Changes

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated
• The PR is tagged with appropriate label (urgent, trivial, complex)

[amandahla]

First time that I approve a PR deleting so many files :-D

[cbartz]

@javierdelapuente Could you assign a label to the PR so that reviewers can estimate the time it will take to review it?