Instantiate PrimaryGuild object in BaseUser

Replaces direct assignment of primary_guild with instantiation of a PrimaryGuild object when data is present, ensuring consistent object structure for user attributes.

Author: Lulalaby

discord/user.py

@@ -154,7 +154,11 @@ def _update(self, data: UserPayload) -> None:
             self.nameplate = Nameplate(data=nameplate, state=self._state)
         else:
             self.nameplate = None
-        self.primary_guild = data.get("primary_guild", None)
+        primary_guild = data.get("primary_guild", None)
+        if primary_guild:
+            self.primary_guild = PrimaryGuild(data=primary_guild, state=self._state)
+        else:
+            self.primary_guild = None
         self._public_flags = data.get("public_flags", 0)
         self.bot = data.get("bot", False)
         self.system = data.get("system", False)