feat: Namespace.get_Cmdlet ( Fixes #1139 )

Author: James Brundage

Types/Namespace/get_Cmdlet.ps1

@@ -0,0 +1,11 @@
+<#
+.SYNOPSIS
+    Gets the cmdlets in the namespace.
+.DESCRIPTION
+    Gets all the cmdlets in the namespace.  
+#>
+if (-not $this.Pattern) { return }
+if (-not $global:AllCmdlets) {
+    $global:AllCmdlets = $global:ExecutionContext.SessionState.InvokeCommand.GetCommands('*','Cmdlet',$true)
+}
+$global:AllCmdlets -match $this.Pattern