fix: fix duplicate name bug

[ejseqera]

Re #123

• Fixes method used to identify value associated with name key or --name argument and use value to identify duplicates
• Disable any usage of overwrite method with --dryrun

Test with a yaml defining teams as following:

teams:
  - name: "launchers"
    organization: "myorg"
    description: "Users with launcher permissions"
    overwrite: true
    members:
      - [email protected]
  - name: "viewers"
    organization: "myorg"
    description: "Users with viewer permissions"
    overwrite: true
    members:
      - [email protected]

Where running seqerakit will correctly provide dryrun output:

$ seqerakit teams.yaml --dryrun
DEBUG:root:DRYRUN: Running command tw teams add --name launchers --organization myorg --description 'Users with launcher permissions'
DEBUG:root:DRYRUN: Running command tw teams members --team launchers --organization myorg add --member [email protected]
DEBUG:root:DRYRUN: Running command tw teams add --name viewers --organization myorg --description 'Users with viewer permissions'
DEBUG:root:DRYRUN: Running command tw teams members --team viewers --organization myorg add --member [email protected]