qml: introduce Separator component

Represents the 1px gray line that separates settings from one another

Author: jarolrod

src/Makefile.qt.include

@@ -336,6 +336,7 @@ QML_RES_QML = \
   qml/components/DeveloperOptions.qml \
   qml/components/PeersIndicator.qml \
   qml/components/NetworkIndicator.qml \
+  qml/components/Separator.qml \
   qml/components/StorageLocations.qml \
   qml/components/StorageOptions.qml \
   qml/components/StorageSettings.qml \

src/qml/bitcoin_qml.qrc

@@ -10,6 +10,7 @@
         <file>components/DeveloperOptions.qml</file>
         <file>components/NetworkIndicator.qml</file>
         <file>components/StorageLocations.qml</file>
+        <file>components/Separator.qml</file>
         <file>components/StorageOptions.qml</file>
         <file>components/StorageSettings.qml</file>
         <file>controls/ContinueButton.qml</file>

src/qml/components/Separator.qml

@@ -0,0 +1,12 @@
+// Copyright (c) 2023 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+import QtQuick 2.15
+import QtQuick.Controls 2.15
+import "../controls"
+
+Rectangle {
+    height: 1
+    color: Theme.color.neutral5
+}