proposal: bare variable use in condition should raise linting error

[ssbarnea]

Because the code below would not work as expected even if you are using perfectly valid YAML booleans, we need a new rule to tell user to add the | bool shenanigan.

- var:
    foo: true
  when: foo  # <-- this needs `| bool` to make it work correctly. 
  debug:
    msg: be surprused that I do not run....

[webknjaz]

In this case, you need to ignore literals like False