Add JWT Authentication Strategy

[DarioCalovic]

Desired Outcome

This PR aims to implement the JWTAuthenticationStrategy in the Conjur API to support JWT-based authentication.

Implemented Changes

• Added the JWTAuthenticationStrategy class to the conjur_api.providers module.
• Updated imports and added unit tests to ensure proper functionality and error handling for missing parameters.
• Reviewers should verify the new strategy and run the automated tests.

Connected Issue/Story

Resolves none, self initiated

CyberArk internal issue ID: none

Definition of Done

At least 1 todo must be completed in the sections below for the PR to be
merged.

Changelog

• The CHANGELOG has been updated, or
• This PR does not include user-facing changes and doesn't require a
  CHANGELOG update

Test coverage

• This PR includes new unit and integration tests to go with the code
  changes, or
• The changes in this PR do not require tests

Documentation

• Docs (e.g. READMEs) were updated in this PR
• A follow-up issue to update official docs has been filed here: [insert issue ID]
• This PR does not require updating any documentation

Behavior

• This PR changes product behavior and has been reviewed by a PO, or
• These changes are part of a larger initiative that will be reviewed later, or
• No behavior was changed with this PR

Security

• Security architect has reviewed the changes in this PR,
• These changes are part of a larger initiative with a separate security review, or
• There are no security aspects to these changes

[hertus]

This should be implemented by default. Thanks for the work @DarioCalovic