Added Basic UI Functionality

DiscordBotUI/Windows/PluginsPage.axaml

@@ -0,0 +1,24 @@
+<Window xmlns="https://github.com/avaloniaui"
+        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:windows="clr-namespace:DiscordBotUI.Windows"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="DiscordBotUI.Windows.PluginsPage"
+        Title="PluginsPage"
+        x:DataType="windows:PluginsPage">
+    <DataGrid Name="dataGridPlugins" Margin="20" ItemsSource="{Binding _Plugins}"
+              IsReadOnly="True"
+              CanUserReorderColumns="True"
+              CanUserResizeColumns="True"
+              CanUserSortColumns="False"
+              GridLinesVisibility="All"
+              BorderThickness="1" BorderBrush="Gray"
+              Foreground="Aqua">
+        <DataGrid.Columns>
+            <DataGridTextColumn Header="Plugin Name" Foreground="Aquamarine" Binding="{Binding Name}"/>
+            <DataGridTextColumn Header="Plugin Version" Binding="{Binding Version}" />
+            <DataGridCheckBoxColumn Header="Is Marked for Uninstall" Binding="{Binding IsMarkedToUninstall}"/>
+        </DataGrid.Columns>
+    </DataGrid>
+</Window>