Init cmd

[gaborschulz-aws]

Description of changes:
New implementation of init command

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[iakov-aws]

In other paces we use a logic of 'ensure' this means if we ask to create it will create or return exisitng. Simiarly with delete if the final state is achieved we do not need to raise a problem.

Please can you review if this fits?

[iakov-aws]

Wgt we do not use a template as in other places?

[iakov-aws]

option 1 (new with Mako)

        template = Template(resource_string(
            package_or_requirement='cid.builtin.core',
            resource_name=template_file,
        ).decode('utf-8'))
        text = template.render(**params)

option 2 (leagcy with sandard lib )

from string import Template
....
      folder_permissions_tpl = Template(resource_string(
          package_or_requirement='cid.builtin.core',
          resource_name=f'data/permissions/folder_permissions.json',
      ).decode('utf-8'))
      columns_tpl = {
          'PrincipalArn': self.qs.get_principal_arn()
      }
      folder_permissions = json.loads(folder_permissions_tpl.safe_substitute(columns_tpl))

This looks more robust and future proof