Changes in generated code

[octokitbot]

The latest OpenAPI spec resulted in changes to the generated code. Please review, set an applicable commit message, merge, and tag a release as appropriate.

[what-the-diff]

PR Summary

• Addition of a Custom BaseURL to NewApiClient:
  Our API Client has been updated to support a custom BaseURL. What this means is that, if needed, we can now direct the client to a different BaseURL than the default.

• Creation of 'Unit Test for Custom BaseURL':
  To ensure that our new custom BaseURL functions as expected, we have created a new test - TestNewApiClientAppAuthBaseUrl - specifically to verify accuracy.

• Amendment to CopilotOrganizationDetails:
  We have added a new field - plan_type - to the CopilotOrganizationDetails. This change allows the type of Copilot plan an organization has to be represented within the system for clearer referencing.

• Introduction of New Enum: CopilotOrganizationDetails_plan_type:
  To support the plan_type field mentioned above, we've created a new set of predefined constants - an 'enum' - called CopilotOrganizationDetails_plan_type to help define the available Copilot plans.

• Improvements to CopilotSeatDetails:
  In a similar vein to the CopilotOrganizationDetails, a plan_type field has been added to the CopilotSeatDetails, indicating the type of seat plan in place.

• Addition of New Enum: CopilotSeatDetails_plan_type:
  To further facilitate this change, we've introduced a new enum - CopilotSeatDetails_plan_type - allowing us to specify different seat plans.