Apply fixes from StyleCI

[mechelon]

This pull request applies code style fixes from an analysis carried out by StyleCI.

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[what-the-diff]

PR Summary

• Improvements to Page.php
  The Page.php was adjusted for better readability and performance. It now handles empty results more gracefully, and the treatment of various property types has been refined.

• Updates to UserCollection.php
  Changes to UserCollection.php involved cleaning up unnecessary comments and adjusting the handling of user data, now supporting a new 'people' type for users.

• Refinement of Property.php
  The Property.php saw numerous improvements, primarily focused on enhancing readability. Checks have been added to ensure certain key data points ('id' and 'object') are present before proceeding. Also, the method dealing with content has been streamlined for early return, making it more efficient.

• Clean up of RecordedEndpointPageTest.php
  In the RecordedEndpointPageTest.php, extraneous imports were removed leading to a leaner, cleaner codebase.