implement Demande de congée (B/F) and generate swagger doc

[mohammedali-khmiri]

Hi @TH-montassar ,

all Leave API created and tested OK

[mohammedali-khmiri]

Hi again ,

Here is the list of leaves displayed on the RH dashboard. I successfully retrieved all leave requests and displayed their information:

• Retrieve the leave status color according to the type of status.
• Ensure the start date and end date are displayed correctly.
• Display the correct difference days between the start and end dates.

[mohammedali-khmiri]

I have updated you. Please let me know if there is anything else to do