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/document.go

@@ -0,0 +1,10 @@
+package core
+
+// Document represents a document or file of interest.
+type Document struct {
+	Title          string `json:"title"`
+	Format         string `json:"format"`
+	Classification string `json:"classification"`
+	HashSHA256     string `json:"hash_sha256"`
+	Source         string `json:"source"`
+}