introduce WorkoutItem, refactor ExerciseTemplate to Exercise

WorkoutsPlus/Workout/WorkoutLibrary.swift

@@ -41,23 +41,13 @@ struct WorkoutLibrary: View {
 										if isAddingWorkout {
 												// TODO: On tap-out of the text field, it should lose focus
 												TextField("New Workout", text: $newWorkoutName, onCommit: {
-														saveWorkout(workout: newWorkout)
+														save(workout: newWorkout)
 												})
 												.textInputAutocapitalization(.words)
 												.focused($isInputFieldFocused)
 										}
-										Button(action: {
-												if isAddingWorkout {
-														saveWorkout(workout: newWorkout)
-												}
-												addWorkout()
-										}) {
-												HStack {
-														Image(systemName: "plus.circle.fill")
-																.foregroundStyle(.green)
-														Text("Add Workout")
-												}
-										}
+										// TODO: When pressing the button again, it should check if something is being added already and if yes, save it.
+										AddItemButton(label: "Workout", action: addWorkout)
 								}
 								.searchable(text: $searchText)
 						}
@@ -80,7 +70,7 @@ struct WorkoutLibrary: View {
 		}
 		
 		// TODO: Brauchen wir das?
-		private func saveWorkout(workout: Workout) {
+		private func save(workout: Workout) {
 				withAnimation {
 						newWorkout.name = newWorkoutName
 						if !workout.name.isEmpty {