feat: initial feature implementation

Author: isabel-anastasiadis-boost

.codeclimate.yml

@@ -13,4 +13,5 @@ checks:
       threshold: 10  # defaults to 5. Cognitive complexity rather than cyclomatic complexity
 
 exclude_patterns:
-  - "**/spec/"
+  - "**/spec/"
+  - "lib/codeclimate_diff/runner.rb" # just testing