Feature Request: --verbose flag

[Zamiell]

Greetings and thanks for the excellent linter.

I propose that deno lint should ship with a --verbose flag that would output extra information about what it is doing.

Specifically, I would like the following information to be outputted:

• The path to the configuration file currently being used, or [no config file found] if no configuration file was found by the tool.
• An alphabetical list of every linting rule that is currently being used.

Other useful information could also be included, but these two things would cover my immediate needs.

[bartlomieju]

deno lint -L debug gives some info, we can apply your suggestions for deno lint -L info. PRs are welcome.