Add other Directory.Build.props to solution

Author: Regenhardt

Directory.Build.props

@@ -1,3 +1,4 @@
+<!-- Root build props for the whole solution -->
 <Project>
   <!-- Package Metadata -->
   <PropertyGroup>

Src/Directory.Build.props

@@ -1,3 +1,4 @@
+<!-- Build props for the libraries (anything under Src/) -->
 <Project>
   <Import Project="..\Directory.Build.props"/>
 

fido2-net-lib.sln

@@ -13,6 +13,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
 		Directory.Build.props = Directory.Build.props
+		Src\Directory.Build.props = Src\Directory.Build.props
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Fido2.Models", "Src\Fido2.Models\Fido2.Models.csproj", "{08AA0431-3BBF-49EF-8DEF-5433B3068D92}"
@@ -21,7 +22,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Fido2.AspNet", "Src\Fido2.A
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Fido2.Ctap2", "Src\Fido2.Ctap2\Fido2.Ctap2.csproj", "{5B998DB8-6E96-4012-B524-32E113815059}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Fido2.Ctap2.Tests", "Tests\Fido2.Ctap2.Tests\Fido2.Ctap2.Tests.csproj", "{BB3D1D09-1506-4DF9-8211-8B284E12B0F8}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Fido2.Ctap2.Tests", "Tests\Fido2.Ctap2.Tests\Fido2.Ctap2.Tests.csproj", "{BB3D1D09-1506-4DF9-8211-8B284E12B0F8}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution