Added AsNewFile switch to Out-CurrentFile (#869)

* Added `AsNewFile` switch, plus, if a file is not open, it creates a new one

* Update module/PowerShellEditorServices/Commands/Public/Out-CurrentFile.ps1

Co-Authored-By: dfinke <finked@hotmail.com>

module/PowerShellEditorServices/Commands/Public/Out-CurrentFile.ps1

@@ -9,14 +9,32 @@ function Out-CurrentFile {
     #>
     [CmdletBinding()]
     param(
-        [Parameter(ValueFromPipeline, Mandatory=$true)]
+        [Switch]$AsNewFile,
+
+        [Parameter(ValueFromPipeline, Mandatory = $true)]
         $InputObject
     )
 
     Begin { $objectsToWrite = @() }
     Process { $objectsToWrite += $InputObject }
     End {
+
+        # If requested, create a new file
+        if ($AsNewFile) {
+            $psEditor.Workspace.NewFile()
+        }
+
         $outputString = "@`"`r`n{0}`r`n`"@" -f ($objectsToWrite|out-string).Trim()
+
+        try {
+            # If there is no file open
+            $psEditor.GetEditorContext()
+        }
+        catch {
+            # create a new one
+            $psEditor.Workspace.NewFile()
+        }
+
         $psEditor.GetEditorContext().CurrentFile.InsertText($outputString)
     }
 }