Added UI tests for creating accessories

[marcusmoore]

Description

This PR adds some simple UI tests for the checking permissions on the accessory index and accessory create pages, along with validation and assertions that accessories can be created via the UI.

Type of change

• Testing

[what-the-diff]

PR Summary

• Addition of Accessory View Permission Test
  A new test has been included to validate the requirement of permissions for viewing the list of accessories. This ensures that only authorized users have access to this list, providing an added layer of security.

• Extension of Create Accessory Tests
  We've further enriched our test coverage with regard to the process of adding new accessories. This includes:

  • Guaranteeing that only those with the correct permissions can access the page to add new accessories. This restricts the ability to make additions to those who are rightfully allowed it.
  • Ensuring that the page for adding new accessories is loaded successfully. This ensures that the page is functional at all times.
  • Validating that only correct and valid data can be used to create an accessory. This preemptively avoids the creation of accessories with inappropriate or misleading data.
  • Lastly, providing an assurance that an accessory can indeed be created when provided with appropriate data. This ensures the overall functionality and integrity of the system.