add two-way translation between existing Profile class and new PersistedProfile CoreData class

damus/Nostr/Nostr.swift

@@ -23,6 +23,18 @@ class Profile: Codable {
         self.nip05 = nip05
     }
     
+    convenience init(persisted_profile: PersistedProfile) {
+        self.init(name: persisted_profile.name,
+                  display_name: persisted_profile.display_name,
+                  about: persisted_profile.about,
+                  picture: persisted_profile.picture,
+                  banner: persisted_profile.banner,
+                  website: persisted_profile.website,
+                  lud06: persisted_profile.lud06,
+                  lud16: persisted_profile.lud16,
+                  nip05: persisted_profile.nip05)
+    }
+    
     private func str(_ str: String) -> String? {
         return get_val(str)
     }