Pydantic-settings-vault

Thank you, vladimir-kotikov, for your contribution! Support for the new authorization
method JWT/OIDC was inspired by your MR to the original project.

Added
- add support for the new authorization method JWT/OIDC

Added
- Relax the version constraint for dependencies (support `hvac` 1.X)
- Support providing a custom CA bundle for Vault certificate validation, or skipping SSL validation altogether

Changed

- BREAKING: Make environment variables override what is defined in the Config, contrary to the previous behaviour
- Drop support of Python 3.7

Added
- Added pydantic 2.x support

Removed
- Dropped support for python 3.6