feat: add overloading to create_repo & update_repo

[anancarv]

Description

Improve the typing of the functions create_repo and update_repo by adding function overloading. This way, we can give to the same function multiple type annotations to more accurately describe the function's behavior.

Type of change

• [x] New feature (non-breaking change which adds functionality)

How has it been tested ?

• [x] https://github.com/anancarv/python-artifactory/blob/8f49592ca13270877b335459c8867bd8c20fd4e3/tests/test_repositories.py#L187
• [x] https://github.com/anancarv/python-artifactory/blob/8f49592ca13270877b335459c8867bd8c20fd4e3/tests/test_repositories.py#L586

Checklist:

• [x] My PR is ready for prime time! Otherwise use the "Draft PR" feature
• [x] All commits have a correct title
• [x] Readme has been updated
• [x] Quality tests are green (see Codacy)
• [x] Automated tests are green (see pipeline)