Finish UserAppointments feature

[Zama15]

Whats new? And Why?

• Rename Fragment since the implementation of fragment with a similar name, it have to be renamed to avoid confusion.
• Main activity was modified in order to reflect the new named fragment
• Add new methods in repositories of Appointment entity as well as the implementation
• Modified AppointmentViewModel to reflect the changes made in the repository
• Add a helper method in ServiceViewModel to clean the state to handle with a observer
• Modified fragment_spa_schedule: Add padding to the Recycler view, modified recycler view and progress bar tags(mainly the relative location in the layout)
• Major changes to the item_cita_agenda, i used this item for the fragment as well, but before it had a GridLayout which make some textView overlaps if i modified the Label, so i change the GridLayout for a ConstraintLayout to make relatives positions instead of absolutes.

https://github.com/user-attachments/assets/acbe1d15-d5e5-47c2-b2bc-e386be09412c

[WolfkarlX]

• Only appointments that were requested by the client and accepted by the spa should be displayed in the calendar, i.e. appointments with a "accepted" status.
• Remove the "Appointment Status" property from the appointment item itself.