Feature Request: input to allow for report format / location

[erzz]

Allow user input to choose the report output and format.

The main reason for this would be to opt in to use the sarif format for integration with Github Security tab - but of course would be useful to create artifacts in various formats for different purposes.

Ideally then combine with an output for the file location too

[williamfalconeruk]

also see #34 and #35

[zricethezav]

closing this in favor of #35