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 Watch App/Models/WorkoutStatus.swift

@@ -0,0 +1,23 @@
+import Foundation
+
+enum WorkoutStatus: String, CaseIterable, Codable {
+    case notStarted = "notStarted"
+    case inProgress = "inProgress"
+    case completed = "completed"
+    case skipped = "skipped"
+
+    var displayName: String {
+        switch self {
+        case .notStarted:
+            return "Not Started"
+        case .inProgress:
+            return "In Progress"
+        case .completed:
+            return "Completed"
+        case .skipped:
+            return "Skipped"
+        }
+    }
+
+    var name: String { displayName }
+}