refactor: reorganize OSINT types — genéricos a core, específicos en cybersecurity

Mueve tipos genéricos (Person, Organization, Location, Email, Phone, Document,
Domain, Event, SocialMedia) de cybersecurity a core. Mantiene en cybersecurity
solo los específicos de seguridad (CryptoWallet, IPAddress, Malware, Vulnerability).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

functions/core/domain.go

@@ -0,0 +1,10 @@
+package core
+
+// Domain represents an internet domain.
+type Domain struct {
+	FQDN        string   `json:"fqdn"`
+	Registrar   string   `json:"registrar"`
+	CreatedDate string   `json:"created_date"`
+	ExpiresDate string   `json:"expires_date"`
+	NameServers []string `json:"name_servers"`
+}