New rule: feature_envy

[danylo-safonov-solid]

https://refactoring.guru/smells/feature-envy
https://github.com/troessner/reek/blob/master/lib/reek/smell_detectors/feature_envy.rb
https://github.com/tsantalis/JDeodorant/blob/master/src/gr/uom/java/jdeodorant/refactoring/views/FeatureEnvy.java

[yurii-prykhodko-solid]

#155 -- an incomplete attempt at implementing the rule; we may be able to complete it.