feat: add aago helper function

[mykeels]

The aago() function returns an array of [ year, month, day, hours, minutes, seconds, milliseconds ] representing a Date instance.

I think this can be a yorlang's date representation, pending when objects are added to the language.

[anoniscoding]

Thank you very much @mykeels . I'm glad you thought of this

[anoniscoding]

Please can you add test cases for the feature? If so, they should include returning the current date when no parameter is passed

[mykeels]

Test cases have been added

[anoniscoding]

Thank you very much bro. Merged the PR bro. For future cases though, i'll prefer more descriptive variable names. Case in point is the variable d, it could have been date. I prefer to read code like a story. Thanks again