add Workout, Exercise and their Library, Add, and Details views

WorkoutsPlus/Exercise/Exercise.swift

@@ -0,0 +1,30 @@
+//
+//  Item.swift
+//  WorkoutsPlus
+//
+//  Created by Felix Förtsch on 10.08.24.
+//
+
+import Foundation
+import SwiftData
+
+@Model
+final class Exercise {
+		var name: String
+		static var systemImage = "figure.run"
+		
+		var timestamp: Date
+		
+		init(_ name: String = "", timestamp: Date = Date.now) {
+				self.name = name
+				self.timestamp = timestamp
+		}
+		
+		static let sampleData = [
+				Exercise("Pull-up"),
+				Exercise("Push-up"),
+				Exercise("Dips"),
+				Exercise("Rows"),
+				Exercise("Split Squat")
+		]
+}