Add instructions on how to use the library

#152

Example.cs

@@ -5,6 +5,10 @@
 
 namespace Schneegans.Unattend;
 
+/// <summary>
+/// This file demonstrates how to use the generator as a stand-alone application. To run this code, change the project's 
+/// output type from ‘Class Library’ to ‘Console Application’ in Visual Studio.
+/// </summary>
 class Example
 {
   public static void Main(string[] args)

Example.ps1

@@ -1,3 +1,7 @@
+# This file demonstrates how to use the library in PowerShell 7.4.x.
+# Download a recent build artifact from GitHub and unzip it, or build the library yourself in Visual Studio.
+# Note that you cannot use this library in Windows PowerShell 5.x.
+
 using namespace Schneegans.Unattend;
 Import-Module -Name "${env:USERPROFILE}\Downloads\net8.0\UnattendGenerator.dll";
 $generator = [UnattendGenerator]::new();

UnattendGenerator.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
 	<TargetFrameworks>net8.0;net9.0</TargetFrameworks>
 	<CheckForOverflowUnderflow>true</CheckForOverflowUnderflow>
-    <OutputType>Exe</OutputType>
+    <OutputType>Library</OutputType>
     <RootNamespace>Schneegans.Unattend</RootNamespace>
     <Nullable>enable</Nullable>
   </PropertyGroup>