Add German Translation

Add German Translation to Core and Defaultplugins

Plugins/Wox.Plugin.PluginManagement/Languages/de.xaml

@@ -0,0 +1,8 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
+
+    <system:String x:Key="wox_plugin_plugin_management_plugin_name">Wox Plugin Verwaltung</system:String>
+    <system:String x:Key="wox_plugin_plugin_management_plugin_description">Installiere/Entferne/Aktualisiere Wox Plugins</system:String>
+    
+</ResourceDictionary>

Plugins/Wox.Plugin.PluginManagement/Wox.Plugin.PluginManagement.csproj

@@ -96,6 +96,13 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <Content Include="Languages\de.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
     <PostBuildEvent>