Add ApplicationNotAllowedException and update related tests

[iMicknl]

This pull request introduces a new exception, ApplicationNotAllowedException, to handle cases where access to a setup is denied for a specific application. It also refactors the exception hierarchy to group related access-denied errors under a new base class, ResourceAccessDeniedException. Additionally, tests and fixtures are updated to cover the new exception.

Exception hierarchy improvements:

• Introduced a new base exception, ResourceAccessDeniedException, and updated NotAuthenticatedException, MissingAuthorizationTokenException, and AccessDeniedToGatewayException to inherit from it for better error categorization. [1] [2] [3]

New exception for application access denial:

• Added ApplicationNotAllowedException (inheriting from ResourceAccessDeniedException) for handling cases when the API returns a "RESOURCE_ACCESS_DENIED" error with the message "Your setup cannot be accessed through this application". [1] [2] [3]

Test and fixture updates:

• Added a new test fixture (cloud/resource-access-denied.json) and updated tests to verify that ApplicationNotAllowedException is raised for the appropriate error response. [1] [2]

[Copilot]

Pull request overview

This PR extends the client’s error-to-exception mapping to recognize a specific RESOURCE_ACCESS_DENIED scenario (“Your setup cannot be accessed through this application”) and adds a corresponding test fixture to validate the new behavior.

Changes:

• Added ApplicationNotAllowedException (and introduced a ResourceAccessDeniedException base class for related errors).
• Updated OverkizClient.check_response() to raise ApplicationNotAllowedException for the new cloud error message.
• Added a new cloud exception fixture and expanded the parameterized client exception tests.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
pyoverkiz/exceptions.py	Adds new exception types and refactors some existing exceptions under a shared ResourceAccessDeniedException base.
pyoverkiz/client.py	Maps the new cloud error message to ApplicationNotAllowedException.
tests/test_client.py	Adds a new parameterized test case to assert the new exception is raised.
tests/fixtures/exceptions/cloud/resource-access-denied.json	Adds fixture payload for the new RESOURCE_ACCESS_DENIED error message.

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