privacy: remove phone number from CV — private data

- Clear phone field in both EN/ES JSON data
- Conditional rendering in footer, plain text, and JSON-LD
- Chat agent already configured to not reveal contact details

data/cv-en.json

@@ -10,7 +10,7 @@
     ],
     "location": "Arrecife, Las Palmas de Gran Canaria, Spain",
     "email": "txeo.msx@gmail.com",
-    "phone": "+34 676875420",
+    "phone": "",
     "dateOfBirth": "1980-03-02",
     "placeOfBirth": "Plasencia (Cáceres), Spain",
     "citizenship": "Spanish",