Support level flag

[tdenewiler]

Right now a new profile file has to be created to specify the desired level to run Statick. We should add support for setting a --level flag that overrides the level specified in the profile file.

[xydesa]

Would this be applied to all packages? even if they have a non-default level specified in the profile file?

[tdenewiler]

That is a great question and we should provide guidance with unit tests to support our choice. I was thinking that a --level flag would override all other levels, even non-default levels specified in a --profile when running Statick. What do you think?

[xydesa]

I think that makes sense from a usability perspective. More granular configuration is available via the profile file, and I could see a user who uses the --level flag wanting just that level to run and nothing else. And being confused if other packages used a different level.