feat: update userRegister field. (#131)

* feat: update max Seq format method.

* update Format method in pb.

* update to correct constant.

* update format method in pb.

* feat: update conversation fields.

* update pb files.

* update ConversationsDestructMsgs method.

* update conversation and msg destruct pb.

* feat: update GroupInfoForSetEX struct.

* update group pb.

* feat: implement request max count limit.

* feat: add PushMsgReq

* remove unused pkg.

* fix

* update SearchMessage response.

* add searchedMsgData

* Update ex field to standard.

* update SetGroupInfoEx

* Update groupInfoex field name to standard

* update setGroupInfoEx field.

* feat: update userRegister field.