add WorkoutIconSelector, change the way adding ExerciseTemplate works to in-List

WorkoutsPlus/Workout/AddExerciseToWorkout.swift

@@ -51,10 +51,10 @@ struct AddExerciseToWorkoutListItem: View {
 				}) {
 						HStack {
 								Text(exerciseTemplate.name)
-										.foregroundColor(.black)
+										.foregroundStyle(.black)
 								Spacer()
 								Image(systemName: "plus.circle.fill")
-										.foregroundColor(.green)
+										.foregroundStyle(.green)
 						}
 				}
 		}