Add Modular Arithmetic approach to RaindropConverter

[habere-et-dispertire]

Pull Request

This looks a little more visual in raku with multi-dispatch supporting built-in types:

multi fizz-buzz ( 1) { <                   > }
multi fizz-buzz (36) { < Pling             > }
multi fizz-buzz (85) { <       Plang       > }
multi fizz-buzz (91) { <             Plong > }
multi fizz-buzz (15) { < Pling Plang       > }
multi fizz-buzz (21) { < Pling       Plong > }
multi fizz-buzz (70) { <       Plang Plong > }
multi fizz-buzz ( 0) { < Pling Plang Plong > }

sub raindrop ($heard) {

    [~] fizz-buzz $heard¹² mod 105 or ~$heard

}

I think it's a fun way to explore deeper into a generalized mathematical approach since it shows that this approach works also with a change in factors so long as they remain co-prime.

---

Reviewer Resources:

Track Policies

[jagdish-15]

You'll also need to create a dedicated directory for this approach inside the .approaches folder and register it in .approaches/config.json.

You can refer to the existing approaches for the expected structure and configuration.

[habere-et-dispertire]

I've made the changes suggested, created the folder structure and mimicked the other approaches. 🤝

[kahgoh]

The last part of the URL should match the slug in the config

Suggested change

	[approach-modulus]: https://exercism.org/tracks/java/exercises/raindrops/approaches/modulus
	[approach-modulus]: https://exercism.org/tracks/java/exercises/raindrops/approaches/modular-arithmetic

[habere-et-dispertire]

Should be okay now no (since I changed the slug) ?