[Console] Output Formatter Decorator

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | possible
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | none
| License       | MIT
| Doc PR        | none

OutputFormatter uses the Decorator to apply Styles to text
Manual about `isset`:
> Returns TRUE if var exists **and has value other than NULL**, FALSE otherwise.

But yes, why two tests if one is enough? Changed it. 
Thank you @iltar!