feat: Simple bluetooth status indication

Sources/scoobytag/BluetoothManager.swift

@@ -0,0 +1,23 @@
+import SwiftUI
+import CoreBluetooth
+
+final class BluetoothManager: NSObject, ObservableObject {
+    private var centralManager: CBCentralManager!
+	@Published var status = "Starting..."
+
+    override init() {
+        super.init()
+        centralManager = CBCentralManager(delegate: self, queue: nil)
+    }
+}
+
+extension BluetoothManager: CBCentralManagerDelegate {
+    func centralManagerDidUpdateState(_ central: CBCentralManager) {
+    switch central.state {
+    case .poweredOn:
+        status = "Bluetooth is on"
+    default:
+        status = "Bluetooth unavailable"
+    }
+}
+}

Sources/scoobytag/ContentView.swift

@@ -0,0 +1,16 @@
+import SwiftUI
+
+struct ContentView: View {
+    @EnvironmentObject var bluetoothManager: BluetoothManager
+
+    var body: some View {
+        VStack {
+            Image(systemName: "globe")
+                .imageScale(.large)
+                .foregroundStyle(.tint)
+            Text("Hello, world!")
+            Text(bluetoothManager.status)
+        }
+        .padding()
+    }
+}

Sources/scoobytag/ScoobyTagApp.swift

@@ -0,0 +1,13 @@
+import SwiftUI
+import CoreBluetooth
+
+@main
+struct ScoobyTagApp: App {
+    @StateObject private var bluetoothManager = BluetoothManager()
+    var body: some Scene {
+        WindowGroup {
+            ContentView()
+                .environmentObject(bluetoothManager)
+        }
+    }
+}