Dino dex 2nd Refactor

DinoDex refactor based on comments from previous pull request.

The DinoDex has a command line interface. Run the "main.rb" script to initialize the CLI.
The methods `all_dino_facts` should really be called something like `find` or `find_by_name`. Down below where you call this method, you don't need a `to_s` since calling `puts` automatically invokes `to_s`.