Added: it alphas validation (\xC0-\xFF is for òàù etc.) (#1975)

🔎 __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.

src/rules/alpha_helper.js

@@ -10,6 +10,7 @@ export const alpha = {
   de: /^[A-ZÄÖÜß]*$/i,
   es: /^[A-ZÁÉÍÑÓÚÜ]*$/i,
   fr: /^[A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ]*$/i,
+  it: /^[A-Z\xC0-\xFF]*$/i,
   lt: /^[A-ZĄČĘĖĮŠŲŪŽ]*$/i,
   nl: /^[A-ZÉËÏÓÖÜ]*$/i,
   hu: /^[A-ZÁÉÍÓÖŐÚÜŰ]*$/i,
@@ -32,6 +33,7 @@ export const alphaSpaces = {
   de: /^[A-ZÄÖÜß\s]*$/i,
   es: /^[A-ZÁÉÍÑÓÚÜ\s]*$/i,
   fr: /^[A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ\s]*$/i,
+  it: /^[A-Z\xC0-\xFF\s]*$/i,
   lt: /^[A-ZĄČĘĖĮŠŲŪŽ\s]*$/i,
   nl: /^[A-ZÉËÏÓÖÜ\s]*$/i,
   hu: /^[A-ZÁÉÍÓÖŐÚÜŰ\s]*$/i,
@@ -54,6 +56,7 @@ export const alphanumeric = {
   de: /^[0-9A-ZÄÖÜß]*$/i,
   es: /^[0-9A-ZÁÉÍÑÓÚÜ]*$/i,
   fr: /^[0-9A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ]*$/i,
+  it: /^[0-9A-Z\xC0-\xFF]*$/i,
   lt: /^[0-9A-ZĄČĘĖĮŠŲŪŽ]*$/i,
   hu: /^[0-9A-ZÁÉÍÓÖŐÚÜŰ]*$/i,
   nl: /^[0-9A-ZÉËÏÓÖÜ]*$/i,
@@ -76,6 +79,7 @@ export const alphaDash = {
   de: /^[0-9A-ZÄÖÜß_-]*$/i,
   es: /^[0-9A-ZÁÉÍÑÓÚÜ_-]*$/i,
   fr: /^[0-9A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ_-]*$/i,
+  it: /^[0-9A-Z\xC0-\xFF_-]*$/i,
   lt: /^[0-9A-ZĄČĘĖĮŠŲŪŽ_-]*$/i,
   nl: /^[0-9A-ZÉËÏÓÖÜ_-]*$/i,
   hu: /^[0-9A-ZÁÉÍÓÖŐÚÜŰ_-]*$/i,