feat: add lockscreen example

lockscreen/Lockscreen.qml

@@ -0,0 +1,51 @@
+import QtQuick
+import QtQuick.Controls.Basic
+
+Item {
+	required property AuthContext context
+
+	Item {
+		anchors.centerIn: parent
+		scale: 2
+
+		TextField {
+			id: entryBox
+			anchors.centerIn: parent
+			width: 300
+
+			enabled: context.status != AuthContext.Status.Authenticating
+			focus: true
+			horizontalAlignment: TextInput.AlignHCenter
+			echoMode: TextInput.Password
+			inputMethodHints: Qt.ImhSensitiveData
+			placeholderText: "Enter password"
+
+			onAccepted: {
+				if (text != "") context.tryLogin(text)
+			}
+
+			onEnabledChanged: {
+				if (enabled) text = ""
+			}
+		}
+
+		Text {
+			id: status
+			color: "white"
+
+			anchors {
+				horizontalCenter: entryBox.horizontalCenter
+				top: entryBox.bottom
+				topMargin: 20
+			}
+
+			text: {
+				switch (context.status) {
+				case AuthContext.Status.FirstLogin: return ""
+				case AuthContext.Status.Authenticating: return "Authenticating"
+				case AuthContext.Status.LoginFailed: return "Login Failed"
+				}
+			}
+		}
+	}
+}