added FluentAvalonia UI library

BackSafe.csproj

@@ -18,6 +18,7 @@
     <PackageReference Include="Avalonia.Desktop" Version="11.3.6" />
     <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.6" />
     <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.6" />
+    <PackageReference Include="FluentAvalonia" Version="1.1.0-beta1" />
     <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
     <PackageReference Include="Avalonia.Diagnostics" Version="11.3.6">
       <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets>

backsafe.sln

@@ -0,0 +1,24 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.2.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BackSafe", "BackSafe.csproj", "{167A4AD4-4F11-F7F9-E8AC-6D41338AF814}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{167A4AD4-4F11-F7F9-E8AC-6D41338AF814}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{167A4AD4-4F11-F7F9-E8AC-6D41338AF814}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{167A4AD4-4F11-F7F9-E8AC-6D41338AF814}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{167A4AD4-4F11-F7F9-E8AC-6D41338AF814}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {BC0EECAB-90E8-450F-BBB1-AF85D5BD3409}
+	EndGlobalSection
+EndGlobal