Archive in Org-Mode: add an option to put the archive file in a subfolder

[ElrunNurle]

Hello,

Thanks for your plugin. A must have from my point of view.

Here is my suggestion: is it possible to add an option to allow us to define a sub-folder where to store the filename_archive.TODO when we use the Org-Mode to archive tasks.
The option should be empty by default te preserve compatibility with the current behavior. If we change the value in the user settings, then we can set the name of the sub-folder to create the archive file in.

Example:
"archive_subfolder": "" => same behavior as now
"archive_subfolder": "_archives" => the archive file will be "_archives/filename_archive.TODO"

Thanks

Best Regards
Patrick