Added tons of basic stuff

KeyboardAudioVisualizer/UI/ConfigurationViewModel.cs

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+using System.Diagnostics;
+using KeyboardAudioVisualizer.Helper;
+
+namespace KeyboardAudioVisualizer.UI
+{
+    public class ConfigurationViewModel
+    {
+        #region Properties & Fields
+
+        #endregion
+
+        #region Commands
+
+        private ActionCommand _openHomepageCommand;
+        public ActionCommand OpenHomepageCommand => _openHomepageCommand ?? (_openHomepageCommand = new ActionCommand(OpenHomepage));
+
+        #endregion
+
+        #region Constructors
+
+        #endregion
+
+        #region Methods
+
+        private void OpenHomepage() => Process.Start("https://github.com/DarthAffe/KeyboardAudioVisualizer");
+
+        #endregion
+    }
+}

KeyboardAudioVisualizer/UI/ConfigurationWindow.xaml

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+<controls:BlurredDecorationWindow x:Class="KeyboardAudioVisualizer.UI.ConfigurationWindow"
+                                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                                  xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+                                  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+                                  xmlns:ui="clr-namespace:KeyboardAudioVisualizer.UI"
+                                  xmlns:controls="clr-namespace:KeyboardAudioVisualizer.Controls"
+                                  mc:Ignorable="d"
+                                  Title="Keyboard Audio-Visualizer # Configuration" 
+                                  Icon="pack://application:,,,/KeyboardAudioVisualizer;component/Resources/Icon.ico"
+                                  IconCommand="{Binding OpenHomepageCommand}"
+                                  Width="1280"  Height="720">
+
+    <controls:BlurredDecorationWindow.DataContext>
+        <ui:ConfigurationViewModel />
+    </controls:BlurredDecorationWindow.DataContext>
+
+    <Grid></Grid>
+
+</controls:BlurredDecorationWindow>

KeyboardAudioVisualizer/UI/ConfigurationWindow.xaml.cs

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+using KeyboardAudioVisualizer.Controls;
+
+namespace KeyboardAudioVisualizer.UI
+{
+    public partial class ConfigurationWindow : BlurredDecorationWindow
+    {
+        public ConfigurationWindow() => InitializeComponent();
+    }
+}