Added a rudimentary settings scene with an empty controller

src/main/java/envoy/client/ui/SettingsSceneController.java

@@ -0,0 +1,13 @@
+package envoy.client.ui;
+
+/**
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>SettingsSceneController.java</strong><br>
+ * Created: <strong>10.04.2020</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Client v0.1-beta
+ */
+public class SettingsSceneController {
+
+}

src/main/resources/fxml/SettingsScene.fxml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.control.Button?>
+<?import javafx.scene.control.ButtonBar?>
+<?import javafx.scene.control.TreeView?>
+<?import javafx.scene.layout.HBox?>
+<?import javafx.scene.layout.VBox?>
+
+<VBox maxHeight="-Infinity" maxWidth="-Infinity"
+	minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0"
+	prefWidth="600.0" xmlns="http://javafx.com/javafx/11.0.1"
+	xmlns:fx="http://javafx.com/fxml/1" fx:controller="envoy.client.ui.SettingsSceneController">
+	<children>
+		<HBox prefHeight="100.0" prefWidth="200.0">
+			<children>
+				<TreeView prefHeight="200.0" prefWidth="200.0" />
+			</children>
+		</HBox>
+		<ButtonBar prefHeight="40.0" prefWidth="200.0">
+			<buttons>
+				<Button cancelButton="true" mnemonicParsing="false"
+					text="Cancel" />
+				<Button mnemonicParsing="false" text="Apply" />
+				<Button defaultButton="true" mnemonicParsing="false"
+					text="Apply &amp; Close" />
+			</buttons>
+		</ButtonBar>
+	</children>
+</VBox>