feat(i18n): add pt-BR support

[Kyo-70]

Here's my contribution to adding my Brazilian Portuguese language to the program.

[theRealPadster]

Thanks for the translation. Before it can be used, it needs to be registered in the locale system. Could you do this step here as well?
https://github.com/spicetify/marketplace/wiki/Localizing-Marketplace#registering-your-language

[theRealPadster]

The file also needs a .json extension

[Kyo-70]

Thanks for the translation. Before it can be used, it needs to be registered in the locale system. Could you do this step here as well? https://github.com/spicetify/marketplace/wiki/Localizing-Marketplace#registering-your-language

I've just made the change and I hope it's correct.

[Kyo-70]

Now I've done it - update file index.ts

[Kyo-70]

Successfully added the order correction update to the Index file.

[theRealPadster]

Passed the checks finally, thank you!