core: add/send contact address and request messages, ios: use auto-reply as welcome message (#6017)

* core: add/send contact address and request messages, ios: use auto-reply as welcome message

* revert event type change

* fix test, type

* multiplatform: update type

* fix query

* ios: hide keyboard when sending the message

* failing test for business chat with a welcome message

* retry joining via contact address

* query plans

* do not send history to the first member (the original customer) of business chat

* correctly handle retries when joining groups, do not create a new connection on retry

* failing test for group welcome message and feature items

* do not send history item if member saw it during joining (based on welcomeSharedMsgId in join request)

* correct fields in PendingContactConnection, update plans

* prevent duplicate group description created in chat, while ensuring that it is created

* fix query

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/ChatModel.kt

@@ -521,7 +521,7 @@ object ChatModel {
         }
       }
     }
-    
+
     private fun chatItemBelongsToScope(cInfo: ChatInfo, cItem: ChatItem): Boolean =
       when (secondaryContextFilter) {
         null ->
@@ -2063,7 +2063,7 @@ enum class MemberCriteria {
 @Serializable
 data class ContactShortLinkData (
   val profile: Profile,
-  val message: String?,
+  val message: MsgContent?,
   val business: Boolean
 )