add Miniplayer, ActiveWorkoutSession skeleton

WorkoutsPlus/Models/WorkoutSession.swift

@@ -0,0 +1,35 @@
+//
+//  WorkoutSession.swift
+//  WorkoutsPlus
+//
+//  Created by Felix Förtsch on 07.09.24.
+//
+
+import Foundation
+import SwiftData
+
+@Model
+final class WorkoutSession {
+		var workout: Workout
+		
+		// Time
+		var startDate = Date.now
+		var stopDate: Date? = nil
+		var duration: TimeInterval? = nil
+		func stopWorkout() {
+				self.stopDate = Date.now
+				if let stopDate = stopDate {
+						self.duration = stopDate.timeIntervalSince(startDate)
+				}
+		}
+		
+		
+//		var isCompleted: Bool
+//		var isPaused: Bool
+//		var isCancelled: Bool
+//		var isDeleted: Bool
+//		var isSynced: Bool
+		init (workout: Workout) {
+				self.workout = workout
+		}
+}