refactor: centralize shortcut recording lifetime

Sources/ConjureKit/GlobalShortcuts.swift

@@ -27,6 +27,13 @@ public final class GlobalShortcuts {
     public let bindings: [GlobalShortcut]
     private let defaults: UserDefaults
     private var isSuspended = false
+    public var isRecording: Bool { isSuspended }
+
+    init(defaults: UserDefaults, bindings: [GlobalShortcut]) {
+        precondition(bindings.count == Self.destinations.count)
+        self.defaults = defaults
+        self.bindings = bindings
+    }
 
     public init(
         defaults: UserDefaults = .standard,
@@ -60,11 +67,23 @@ public final class GlobalShortcuts {
         return errors
     }
 
-    public func suspend() {
+    public func beginRecording() {
         isSuspended = true
         bindings.forEach { $0.suspend() }
     }
 
+    public func cancelRecording() -> [String] {
+        guard isRecording else { return [] }
+        return start()
+    }
+
+    public func finishRecording(_ candidate: KeyboardShortcut?, at index: Int) -> [String] {
+        var errors: [String] = []
+        do { try setShortcut(candidate, at: index) }
+        catch { errors.append(error.localizedDescription) }
+        return errors + cancelRecording()
+    }
+
     public func stop() {
         isSuspended = false
         bindings.forEach { $0.stop() }