Docs: Add an example in Javascript

[sergiJimenez]

Hello there!
It would be fantastic if we have an example of how to use Swapy in Javascript to use it as fast as it possible, like we have in examples/basic.

What do you think about it?

[TahaSh]

@sergiJimenez Thank you for the suggestion! It seems quite similar to what we already have on the homepage. I might consider adding it in the future when we have more pages in the docs. For now, I’d like to keep the homepage simple and clean.

[sergiJimenez]

Thank you for answering me. I will follow closely the development of this library. Congratulations for such a good idea!

[TahaSh]

@sergiJimenez Thank you! 🙏