[sui-i18n] Move external dependency to package

[rmoralp]

Package

@s-ui/i18n

Description

This package has node-polyglot@0.4.3 as a dependency.
This version size is about 2.3kB minified

Given latest node-polyglot version (2.4.2) size is about 35.5kB minified
And current version achieve all our requirements
Then we have decided to move node-polyglot@0.4.3 code to @s-ui/i18n package and maintain this code.

Additional Information

This task is not only about moving code to our package, we want to keep our code style and also cover it with tests