feature(general): transactional emails translated to Italian (#903)

* base for translations

* Update payout-email-it.html

* Update welcome-1-it.html

* Update welcome-2-it.html

* Update welcome-3-it.html

* Update welcome-4-it.html

* Small changes to fix last details

* Prettified Code!

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Co-authored-by: ricsoincome <[email protected]>
Co-authored-by: ssandino <[email protected]>