Move mailboxes admin command to a separate file

bot/command.go

@@ -224,51 +224,6 @@ func (b *Bot) sendHelp(ctx context.Context, roomID id.RoomID) {
 	b.SendNotice(ctx, roomID, msg.String())
 }
 
-func (b *Bot) sendMailboxes(ctx context.Context) {
-	evt := eventFromContext(ctx)
-	mailboxes := map[string]id.RoomID{}
-	b.rooms.Range(func(key any, value any) bool {
-		if key == nil {
-			return true
-		}
-		if value == nil {
-			return true
-		}
-
-		mailbox, ok := key.(string)
-		if !ok {
-			return true
-		}
-		roomID, ok := value.(id.RoomID)
-		if !ok {
-			return true
-		}
-
-		mailboxes[mailbox] = roomID
-		return true
-	})
-
-	if len(mailboxes) == 0 {
-		b.SendNotice(ctx, evt.RoomID, "No mailboxes are managed by the bot so far, kupo!")
-		return
-	}
-
-	var msg strings.Builder
-	msg.WriteString("The following mailboxes are managed by the bot:\n")
-	for mailbox, roomID := range mailboxes {
-		msg.WriteString("* `")
-		msg.WriteString(mailbox)
-		msg.WriteString("@")
-		msg.WriteString(b.domain)
-		msg.WriteString("` - `")
-		msg.WriteString(roomID.String())
-		msg.WriteString("`")
-		msg.WriteString("\n")
-	}
-
-	b.SendNotice(ctx, evt.RoomID, msg.String())
-}
-
 func (b *Bot) runStop(ctx context.Context) {
 	evt := eventFromContext(ctx)
 	cfg, err := b.getSettings(evt.RoomID)