add a phone number output in E164 format

[ZhiVV]

Feature request

add a parameter to the function 'phone_number' that will return the result in the e164 format

Thesis

Currently, when executing the 'person.phone_number()' without param 'mask', the results are displayed in different national formats from execution to execution.
Example for Locale AR_DZ:
0578549188 or (+213) 0621880931
Example for Locale EN:
+1-909-131-2931 vs +15071035764

Reasoning

If some project used Google's common library libphonenumber to validate the entered phone numbers then, most likely, they store phones in the E164 format in the database. It will be more convenient to insert the generated phone numbers into the database or use them in autotests if they are immediately in the e164 format.