Add CoreData-based workout tracking app with iOS and watchOS targets

- Migrate from SwiftData to CoreData with CloudKit sync
- Add core models: Split, Exercise, Workout, WorkoutLog
- Implement tab-based UI: Workout Logs, Splits, Settings
- Add SF Symbols picker for split icons
- Add exercise picker filtered by split with exclusion of added exercises
- Integrate IndieAbout for settings/about section
- Add Yams for YAML exercise definition parsing
- Include starter exercise libraries (bodyweight, Planet Fitness)
- Add Date extensions for formatting (formattedTime, isSameDay)
- Format workout date ranges to show time-only for same-day end dates
- Add build number update script
- Add app icons

Workouts/Views/Splits/OrderableItem.swift

@@ -0,0 +1,30 @@
+//
+// OrderableItem.swift
+// Workouts
+//
+// Created by rzen on 7/18/25 at 5:19 PM.
+//
+// Copyright 2025 Rouslan Zenetl. All Rights Reserved.
+//
+
+import Foundation
+
+/// Protocol for items that can be ordered in a sequence
+protocol OrderableItem {
+    /// Updates the order of the item to the specified index
+    func updateOrder(to index: Int)
+}
+
+/// Extension to make Split conform to OrderableItem
+extension Split: OrderableItem {
+    func updateOrder(to index: Int) {
+        self.order = Int32(index)
+    }
+}
+
+/// Extension to make Exercise conform to OrderableItem
+extension Exercise: OrderableItem {
+    func updateOrder(to index: Int) {
+        self.order = Int32(index)
+    }
+}