Merge branch 'main' of https://git.cs.usask.ca/esc568/cmpt-370-group-project into main

.../main/java/com/example/scheduler_server/Availability.java

.../src/main/java/com/example/scheduler_server/Schedule.java

...App/src/main/java/com/example/scheduler_server/Staff.java

...rApp/src/main/java/com/example/schedulerapp/Employee.java

...ulerApp/src/main/java/com/example/schedulerapp/Model.java

...ulerApp/src/main/java/com/example/schedulerapp/Shift.java