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

.../main/java/com/example/schedulerapp/AvailabilityView.java

...pp/src/main/java/com/example/schedulerapp/Controller.java

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

...ain/resources/com/example/schedulerapp/addShiftPopup.fxml

...in/resources/com/example/schedulerapp/employeeHeader.fxml

...ain/resources/com/example/schedulerapp/headerManager.fxml

...main/resources/com/example/schedulerapp/timeOffPopup.fxml