add always sorted [WorkoutItem], ContentUnavailableView to searches, SampleData import, refactor WorkoutItem init

WorkoutsPlus/Debug/DebugList.swift

@@ -9,6 +9,8 @@ import SwiftUI
 import SwiftData
 
 struct DebugList: View {
+		@Environment(\.modelContext) private var modelContext
+		
 		@Query(sort: \Exercise.name) private var exercises: [Exercise]
 		@Query(sort: \Workout.name) private var workouts: [Workout]
 		@Query(sort: \WorkoutItem.name) private var workoutItems: [WorkoutItem]
@@ -16,6 +18,9 @@ struct DebugList: View {
 		
 		var body: some View {
 				List {
+						Button(action: {SampleData.insertSampleData(into: modelContext)} ) {
+								Text("Insert Sample Data")
+						}
 						Section(header: Text("Exercises")) {
 								ForEach(exercises) { exercise in
 										DebugListItem(item: exercise)

WorkoutsPlus/Debug/SampleData.swift

@@ -24,13 +24,15 @@ class SampleData {
 				
 				do {
 						modelContainer = try ModelContainer(for: schema, configurations: [modelConfiguration])
-						insertSampleData()
+						SampleData.insertSampleData(into: context)
 				} catch {
 						fatalError("Could not create ModelContainer: \(error)")
 				}
 		}
-		
-		func insertSampleData() {
+}
+
+extension SampleData {
+		static func insertSampleData(into context: ModelContext) {
 				for exercise in Exercise.sampleDataRecommendedRoutine {
 						context.insert(exercise)
 				}