Image filters with mini-magick

[VictorMotogna]

• this will assume that the user has mini-magick installed; we either need to include this in the documentation or specifically install it when the user selects to run this specific benchmark (but notify the user that this will happen)
• you can use this article as a guideline
• as the project will also have some dependencies and need a Gemfile, I recommend creating a new folder for it in ruby/choose_name
• the main functionality can be as simple as reversing an image, but having as many filters/modifications as possible will improve the final results, so if you find anything else that could be added, that would help