[NUI] Add window blur sample

Add window blur sample which has both background blur and corner radius.
In addition, multi window blur's case supports, too.

test/NUIWindowBlur/NUIWindowBlur.csproj

@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net6.0</TargetFramework>
+    </PropertyGroup>
+
+    <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+        <DebugType>portable</DebugType>
+    </PropertyGroup>
+    <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+        <DebugType>None</DebugType>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Tizen.NET.Sdk" Version="1.0.9" />
+        <ProjectReference Include="../../src/Tizen.NUI.Components/Tizen.NUI.Components.csproj" />
+        <ProjectReference Include="../../src/Tizen.NUI/Tizen.NUI.csproj" />
+    </ItemGroup>
+
+    <PropertyGroup>
+        <NeedInjection>True</NeedInjection>
+    </PropertyGroup>
+
+</Project>
+

test/NUIWindowBlur/tizen-manifest.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns="http://tizen.org/ns/packages" api-version="6" package="org.tizen.example.NUIWindowBlur" version="1.0.0">
+  <profile name="common" />
+  <ui-application appid="org.tizen.example.NUIWindowBlur"
+					exec="NUIWindowBlur.dll"
+					type="dotnet-nui"
+					multiple="false"
+					taskmanage="true"
+					nodisplay="false"
+					launch_mode="single"
+          >
+    <label>NUIWindowBlur</label>
+    <icon>NUIWindowBlur.png</icon>
+    <metadata key="http://tizen.org/metadata/prefer_dotnet_aot" value="true" />
+  </ui-application>
+</manifest>