Config file with only exclude rules do not work as expected

[yorinasub17]

I don't remember if this was intentional or not.

If you create a config file where there is only an exclude rule, intuitively this should mean "include everything but what is requested to be excluded," but in practice this becomes "exclude everything" because cloud-nuke treats empty include rules as "include nothing."

You can work around this by adding an explicit include rule to include everything:

s3:
  include:
    names_regex:
      - ".*"
  exclude:
    names_regex:
      - "^my-real-s3-bucket$"