Replace inline script with AddCommand

Author: andyleejordan

src/PowerShellEditorServices/Services/PowerShellContext/Session/PSReadLinePromptContext.cs

@@ -24,16 +24,6 @@ internal class PSReadLinePromptContext : IPromptContext
             "..",
             "PSReadLine");
 
-        // TODO: Does this have to be done in an inline script?
-        private static readonly string ReadLineInitScript = $@"
-            [System.Diagnostics.DebuggerHidden()]
-            [System.Diagnostics.DebuggerStepThrough()]
-            param()
-            end {{
-                Import-Module '{_psReadLineModulePath.Replace("'", "''")}'
-                return [Microsoft.PowerShell.PSConsoleReadLine]
-            }}";
-
         private static readonly Lazy<CmdletInfo> s_lazyInvokeReadLineForEditorServicesCmdletInfo = new Lazy<CmdletInfo>(() =>
         {
             var type = Type.GetType("Microsoft.PowerShell.EditorServices.Commands.InvokeReadLineForEditorServicesCommand, Microsoft.PowerShell.EditorServices.Hosting");
@@ -90,7 +80,9 @@ internal static bool TryGetPSReadLineProxy(
             {
                 pwsh.Runspace = runspace;
                 var psReadLineType = pwsh
-                    .AddScript(ReadLineInitScript, useLocalScope: true)
+                    .AddCommand("Microsoft.PowerShell.Core\\Import-Module")
+                        .AddParameter("Name", _psReadLineModulePath)
+                    .AddCommand("return [Microsoft.PowerShell.PSConsoleReadLine]")
                     .Invoke<Type>()
                     .FirstOrDefault();