Added playlists view. Added messaging service. Added logic for adding and deleting playlists.

Harmonia.WinUI/Harmonia.WinUI.csproj

@@ -17,6 +17,7 @@
 	<ItemGroup>
 	  <None Remove="Resources\Styles.xaml" />
 	  <None Remove="Views\PlayerView.xaml" />
+	  <None Remove="Views\PlaylistsView.xaml" />
 	</ItemGroup>
 
 	<ItemGroup>
@@ -55,6 +56,11 @@
 	    <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
 	  </Content>
 	</ItemGroup>
+	<ItemGroup>
+	  <Page Update="Views\PlaylistsView.xaml">
+	    <Generator>MSBuild:Compile</Generator>
+	  </Page>
+	</ItemGroup>
 	<ItemGroup>
 	  <Page Update="Resources\Geometry.xaml">
 	    <SubType>Designer</SubType>