The commit refactors the server-side modules of the Roxy-WI web interface to use JSON-based APIs for improved data exchange. Specifically, methods for user, group and SSH management have been updated to accept and return JSON data. Simultaneously, error handling is improved to give more informative responses instead of plain strings. The client-side JavaScript code is also refactored to accommodate these changes. Additionally, some minor corrections are made in the UI templates.
The requirements for el9, deb, and main have been updated to specifically use version 2.27.1 of the "requests" package. In addition, the date formatting function get_time_zoned_date in common.py has been refactored. The default format for the date has been moved to the function arguments, and the function now also checks if the provided date is an instance of datetime before processing it.