CRUD operation for Cities, WorkingDays and ExceptionDays

[sherifelkhiat]

Cities Table Columns:

• Source_City (string)
• Destination_City (string)
• Duration (in minutes) (integer)
• Extra_cost (decimal)
• TimeStamp

WorkingDays Columns:

• day (string) (sunday, monday, etc..)
• from (time)
• to (time)
• TimeStamp

ExceptionDays Columns:

• Date
• TimeStamp

[sherifelkhiat]

add the column that does not exist now and fix the ui problem