feat: participant kick reason add

JitsiConference.js

 /**
  * Kick participant from this conference.
  * @param {string} id id of the participant to kick
+ * @param {string} reason reason of the participant to kick
  */
-JitsiConference.prototype.kickParticipant = function(id) {
+JitsiConference.prototype.kickParticipant = function(id, reason) {
     const participant = this.getParticipantById(id);
 
     if (!participant) {
         return;
     }
-    this.room.kick(participant.getJid());
+    this.room.kick(participant.getJid(), reason);
 };
 
 /**
  * of the kick.
  * @param {string?} kickedParticipantId - when it is not a kick for local participant,
  * this is the id of the participant which was kicked.
+ * @param {string} reason - reason of the participant to kick
  */
-JitsiConference.prototype.onMemberKicked = function(isSelfPresence, actorId, kickedParticipantId) {
+JitsiConference.prototype.onMemberKicked = function(isSelfPresence, actorId, kickedParticipantId, reason) {
     // This check which be true when we kick someone else. With the introduction of lobby
     // the ChatRoom KICKED event is now also emitted for ourselves (the kicker) so we want to
     // avoid emitting an event where `undefined` kicked someone.
 
     if (isSelfPresence) {
         this.eventEmitter.emit(
-            JitsiConferenceEvents.KICKED, actorParticipant);
+            JitsiConferenceEvents.KICKED, actorParticipant, reason);
 
         this.leave();
 
     const kickedParticipant = this.participants[kickedParticipantId];
 
     this.eventEmitter.emit(
-        JitsiConferenceEvents.PARTICIPANT_KICKED, actorParticipant, kickedParticipant);
+        JitsiConferenceEvents.PARTICIPANT_KICKED, actorParticipant, kickedParticipant, reason);
 };
 
 /**

modules/xmpp/ChatRoom.js

                 actorNick = actorSelect.attr('nick');
             }
 
+            let reason;
+            const reasonSelect
+                = $(pres).find(
+                '>x[xmlns="http://jabber.org/protocol/muc#user"]'
+                + '>item>reason');
+
+            if (reasonSelect.length) {
+                reason = reasonSelect.text();
+            }
+
             // we first fire the kicked so we can show the participant
             // who kicked, before notifying that participant left
             // we fire kicked for us and for any participant kicked
                 XMPPEvents.KICKED,
                 isSelfPresence,
                 actorNick,
-                Strophe.getResourceFromJid(from));
+                Strophe.getResourceFromJid(from),
+                reason);
         }
 
         if (isSelfPresence) {
     /**
      *
      * @param jid
+     * @param reason
      */
-    kick(jid) {
+    kick(jid, reason = 'You have been kicked.') {
         const kickIQ = $iq({ to: this.roomjid,
             type: 'set' })
             .c('query', { xmlns: 'http://jabber.org/protocol/muc#admin' })
             .c('item', { nick: Strophe.getResourceFromJid(jid),
                 role: 'none' })
-            .c('reason').t('You have been kicked.').up().up().up();
+            .c('reason').t(reason).up().up().up();
 
         this.connection.sendIQ(
             kickIQ,