Allow user defined font settings

[ndrogers]

With this package installed, all APL files are forced to use a specific font family. Please allow a User Settings option to override the font family.

[e9gille]

The extension is merely providing a default setting for the apl language. VSCode supports settings to be defined either on workspace level or in user settings as you suggest. You can define your own override in either of those by specifying the language identifier like this (example is demonstrating the current default provided by the extension):

"[apl]": {
  "editor.fontFamily": "APL385 Unicode, Consolas, 'Courier New', monospace"
}