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/SplitItem.swift

@@ -0,0 +1,61 @@
+//
+// SplitItem.swift
+// Workouts
+//
+// Created by rzen on 7/18/25 at 2:45 PM.
+//
+// Copyright 2025 Rouslan Zenetl. All Rights Reserved.
+//
+
+import SwiftUI
+
+struct SplitItem: View {
+    @ObservedObject var split: Split
+
+    var body: some View {
+        VStack {
+            ZStack(alignment: .bottom) {
+                // Golden ratio rectangle (1:1.618)
+                RoundedRectangle(cornerRadius: 12)
+                    .fill(
+                        LinearGradient(
+                            gradient: Gradient(colors: [splitColor, splitColor.darker(by: 0.2)]),
+                            startPoint: .topLeading,
+                            endPoint: .bottomTrailing
+                        )
+                    )
+                    .aspectRatio(1.618, contentMode: .fit)
+                    .shadow(radius: 2)
+
+                GeometryReader { geo in
+                    VStack(spacing: 4) {
+                        Spacer()
+
+                        // Icon in the center - using dynamic sizing
+                        Image(systemName: split.systemImage)
+                            .font(.system(size: min(geo.size.width * 0.3, 40), weight: .bold))
+                            .scaledToFit()
+                            .frame(maxWidth: geo.size.width * 0.6, maxHeight: geo.size.height * 0.4)
+                            .padding(.bottom, 4)
+
+                        // Name at the bottom inside the rectangle
+                        Text(split.name)
+                            .font(.headline)
+                            .lineLimit(1)
+                            .padding(.horizontal, 8)
+
+                        Text("\(split.exercisesArray.count) exercises")
+                            .font(.caption)
+                            .padding(.bottom, 8)
+                    }
+                    .foregroundColor(.white)
+                    .frame(width: geo.size.width, height: geo.size.height)
+                }
+            }
+        }
+    }
+
+    private var splitColor: Color {
+        Color.color(from: split.color)
+    }
+}