[CodeQuality] Add ESLint configuration

[alvarowolfx]

Is easy to add ESLint to the project and we can have a standard code style for all the contributions. Later when CI support is added, the code style can also be validated.

Now, which code style to use? 🤔
https://www.npmjs.com/package/eslint-config-airbnb
https://github.com/google/eslint-config-google

[RodolfoSilva]

@alvarowolfx We don't use any style guide. But i prefere use the StandarJS https://standardjs.com/.