Added: it alphas validation (\xC0-\xFF is for òàù etc.)

[exodusanto]

🔎 Overview

Added IT locale to alpha, alphaSpaces, alphanumeric, alphaDash validations.
\xC0-\xFF is for ÀàÈè and other chars.

Ex (Feat):

This PR adds the IT alpha validation.

[codecov]

Codecov Report

Merging #1975 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1975   +/-   ##
=======================================
  Coverage   95.98%   95.98%           
=======================================
  Files          62       62           
  Lines        2341     2341           
  Branches      729      729           
=======================================
  Hits         2247     2247           
  Misses         85       85           
  Partials        9        9

Impacted Files	Coverage Δ
src/rules/alpha_helper.js	100% <ø> (ø)	⬆️

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[logaretm]

Much appreciated!