Improve and update API versioning

[skupriienko]

Links:

• DE-1453

Actions:

• client.py:

  • Rewrite Config's __getitem__() to handle API versions implicitly.
  • add "sending_queues"
  • create special_cases with different API versions
  • handle v3_domain_endpoints

• Add missing examples:

  • DOMAINS:
    • update_simple_domain()
    • delete_all_domain_credentials()
    • get_sending_queues()
  • MAILING_LISTS:
    • get_lists()
    • get_member_list()
  • _SUPPRESSIONS_:
    • get_single_complaint()
    • delete_all_whitelists()
  • WEBHOOKS:
    • get_webhook()

• Remove a deprecated example:

  • mailgun/examples/stats_examples.py (it will be replaced with metrics)

• Docstrings:

  • fix docstrings of view_message_with_storage_url()

• Demo csv files:

  • fix mailgun/doc_tests/files/mailgun_bounces_test.csv
  • fix mailgun/doc_tests/files/mailgun_unsubscribes.csv
  • add mailgun/doc_tests/files/data.csv

• Fix/improve handlers by correctly managing endpoints:

  • domain_handler.py:
    • Replacing v4 with v3 for 'Delete a domain API' because it's still v3 and it fails with v4, see https://documentation.mailgun.com/docs/mailgun/api-reference/openapi-final/tag/Domains/#tag/Domains/operation/DELETE-v3-domains--name-
    • add handle_sending_queues() for /{domain}/sending_queues
  • ip_pools_handler.py
  • add new logic

• Tests:

  • Remove:
    • deprecated StatsTests as they will be replaced with metrics.
  • Add:
  • test_update_simple_domain
  • test_get_sending_queues
  • test_maillists_lists_members_get
  • test_delete_all_domain_credentials but skip it because if all credentials are deleted then test_update_simple_domain fails
  • All tests pass

• CI:

  • Update pre-commit hooks

• Style

  • Formatting & linting with pre-commit
  • Add more ignoring rules to ruff settings

• docs:

  • Update README.md
  • License name is Apache-2.0

• Package Management:

  • update project's name in pyproject.toml
  • update project.urls in pyproject.toml
  • license is Apache-2.0
  • update conda.recipe