Default diagram save location

[jeffvogelsang]

Looks like this plug defaults to saving diagrams adjacent to the file you're inserting a diagram into. It would be useful to have an option to specify where the drawing is created:

1.) Same directory as referencing file. 2.) Respect Obsidian's setting for default attachment location. 3.) Allow setting a specific directory for all files created with the plugin.

[zapthedingbat]

Yes, that makes sense, seems like a good enhancment.