Import - Improve phone validation (#12901)

Context : 
- Phones import is a bit complex if not all subfields are provided.
- Phones subfield validation are absent or different from BE validation.

Solution : 
- Normalize callingCode and countryCode validation (BE/FE)
- Ease phone import if only phoneNumber is provided

packages/twenty-shared/package.json

@@ -22,6 +22,7 @@
   },
   "dependencies": {
     "@sniptt/guards": "^0.2.0",
+    "libphonenumber-js": "^1.10.26",
     "zod": "3.23.8"
   },
   "preconstruct": {