Microsoft, for some reason, does not appear to provide a schema except for the Policy rule definition, which makes doing
Azure Policy-as-Code difficult to work with if you don't have proper intellisense and validation in your editor.
The VSCode extension basically just adds automatic schema validation for files that follow the Azure Policy as Code
model. To specify your own file format, copy the jsonValidation key from the package.json and paste it into
either your user or workspace settings, and modify the fileMatch appropriately. [More info about schema mapping is here](https://github.com/JustinGrote/AzurePolicySchema/blob/HEAD/