Defined the InputFieldFocus enumeration in the app target.

App/Sources/Enumerations/InputFieldFocus.swift

@@ -0,0 +1,17 @@
+/// Identifies which input field should receive keyboard focus in todo task editing interfaces.
+///
+/// This enumeration is designed to work with focus state property wrapper, enabling programmatic
+/// control of keyboard focus between different text input fields when editing todo tasks.
+enum InputFieldFocus {
+    /// The note text field has keyboard focus.
+    ///
+    /// This case represents the optional multi-line note field where users can
+    /// add additional details about a todo task.
+    case note
+    
+    /// The title text field has keyboard focus.
+    ///
+    /// This case represents the primary title field where users enter the
+    /// title of a todo task.
+    case title
+}