Improve Kiota generator error messages & implicitly include packages

Author: Lamparter

src/features/Riverside.CompilerPlatform.Features.Kiota/Kiota.props

@@ -4,6 +4,9 @@
 		<Kiota_MinLangVersion>7.3</Kiota_MinLangVersion>
 		<Kiota_AuthPackageVersion>1.21.2</Kiota_AuthPackageVersion>
 		<Kiota_BundlePackageVersion>1.21.2</Kiota_BundlePackageVersion>
+
+		<Kiota_LangVersionError>The Advanced Compiler Services for .NET library requires C# $(Kiota_MinLangVersion) or later.</Kiota_LangVersionError>
+		<Kiota_TargetFrameworkError>The Advanced Compiler Services for .NET library supports only netstandard2.0, netstandard2.1, net462, and net8.0 or later.</Kiota_TargetFrameworkError>
 	</PropertyGroup>
 
 	<!--<Target Name="Kiota_EnsureDependencies" BeforeTargets="CollectPackageReferences">
@@ -30,7 +33,7 @@
 		<Error
 			Condition="'$(LangVersion)' == ''"
 			Code="KG1001"
-			Text="Riverside Kiota requires C# LangVersion 7.3 or later. Set &lt;LangVersion&gt;7.3&lt;/LangVersion&gt; or newer." />
+			Text="$(Kiota_LangVersionError) Set &lt;LangVersion&gt;7.3&lt;/LangVersion&gt; or newer." />
 
 		<Error
 			Condition="
@@ -41,7 +44,7 @@
 				and $([System.Text.RegularExpressions.Regex]::IsMatch('$(LangVersion)', '^[0-9]+(\.[0-9]+)?$'))
 				and !$([MSBuild]::VersionGreaterThanOrEquals('$(LangVersion)', '$(Kiota_MinLangVersion)'))"
 			Code="KG1002"
-			Text="The Advanced Compiler Services for .NET library requires C# 7.3 or later. The current language version is '$(LangVersion)'." />
+			Text="$(Kiota_LangVersionError) The current language version is '$(LangVersion)'." />
 
 		<Error
 			Condition="
@@ -51,12 +54,12 @@
 				and !($([System.String]::Copy('$(LangVersion)').Equals('preview', System.StringComparison.OrdinalIgnoreCase)))
 				and !$([System.Text.RegularExpressions.Regex]::IsMatch('$(LangVersion)', '^[0-9]+(\.[0-9]+)?$'))"
 			Code="KG1003"
-			Text="The Advanced Compiler Services for .NET library requires C# 7.3 or later. Unsupported LangVersion value '$(LangVersion)'." />
+			Text="$(Kiota_LangVersionError) Unsupported LangVersion value '$(LangVersion)'." />
 
 		<Error
 			Condition="'@(_Kiota_InvalidFramework)' != ''"
 			Code="KG1004"
-			Text="The Advanced Compiler Services for .NET library supports only netstandard2.0, netstandard2.1, net462, and net8.0 or later. Invalid target framework(s): @(_Kiota_InvalidFramework, ', ')." />
+			Text="$(Kiota_TargetFrameworkError) Invalid target framework(s): @(_Kiota_InvalidFramework, ', ')." />
 
 		<Warning
 			Condition="'$(Nullable)' == '' or $([System.String]::Copy('$(Nullable)').Equals('disable', System.StringComparison.OrdinalIgnoreCase))"

src/features/Riverside.CompilerPlatform.Features.Kiota/Riverside.CompilerPlatform.Features.Kiota.csproj

@@ -24,6 +24,8 @@
 		</PackageReference>
 		<PackageReference Include="Microsoft.Kiota.Authentication.Azure" Version="1.21.2" />
 		<PackageReference Include="Microsoft.Kiota.Bundle" Version="1.21.2" />
+		<PackageReference Include="System.Net.Http.Json" Version="10.0.4" />
+		<PackageReference Include="System.Text.Json" Version="10.0.4" />
 	</ItemGroup>
 
 	<Target Name="PackKiotaAnalyzer" BeforeTargets="_GetPackageFiles">