Code CLI script - Githubissues

[x] Gets category list
[x] Prompts it with an index
[x] Asks the user to enter the index of the selected category
- [x] If index is not valid, re-ask
[x] Lists all products
[x] Asks the user to enter the index of the selected product
- [x] If index is not valid, re-ask
[x] Shows the 1st product in the same category with the lowest nutriscore
[x] Saves if user choose it
[x] Adds access to substitutes backed-up

freezed / ocp5