feat: pack tools and fix nullability

Author: emako

build/.gitignore

@@ -3,3 +3,5 @@
 Build/
 /*.exe
 /*.7z
+/*.nupkg
+/*.snupkg

build/MicaSetup.Tools/MakeMica.Cli/Core/CSharpProgram.cs

@@ -298,7 +298,7 @@ inv.Expression is MemberAccessExpressionSyntax memberAccess &&
         var newArgList = SyntaxFactory.ArgumentList(
             SyntaxFactory.SingletonSeparatedList(
                 SyntaxFactory.Argument(
-                    SyntaxFactory.LiteralExpression(SyntaxKind.StringLiteralExpression, SyntaxFactory.Literal(value))
+                    SyntaxFactory.LiteralExpression(SyntaxKind.StringLiteralExpression, SyntaxFactory.Literal(value!))
                 )
             )
         );

build/tools_build.cmd

@@ -9,6 +9,7 @@ dotnet publish MicaSetup.Tools\MakeMica\MakeMica.csproj -c Release -p:PublishPro
 dotnet publish MicaSetup.Tools\MakeMica.Cli\MakeMica.Cli.csproj -c Release -p:PublishProfile=FolderProfile
 dotnet publish MicaSetup.Tools\MakeMui\MakeMui.csproj -c Release -p:PublishProfile=FolderProfile
 dotnet publish MicaSetup.Tools\MICA\MICA.csproj -c Release -p:PublishProfile=FolderProfile
+dotnet pack MicaSetup.Tools\MicaSetup.Tools\MicaSetup.Tools.csproj -c Release -p:PublishProfile=FolderProfile
 
 echo [copy]
 
@@ -38,6 +39,9 @@ copy /y .\MicaSetup.Tools\MakeIcon.Cli\bin\Release\publish\MakeIcon.Cli.exe .\Bu
 del .\Build\makeicon.exe
 ren .\Build\MakeIcon.Cli.exe makeicon.exe
 
+copy /y .\MicaSetup.Tools\MicaSetup.Tools\bin\Release\*.nupkg .\
+copy /y .\MicaSetup.Tools\MicaSetup.Tools\bin\Release\*.snupkg .\
+
 copy /y .\MicaSetup.Tools\7-Zip\7z.dll .\Build\bin\7z.dll
 copy /y .\MicaSetup.Tools\7-Zip\7z.exe .\Build\bin\7z.exe