Resolved #2. (Added mention all players with @all in message.)

Signed-off-by: Pavel Erokhin (MairwunNx) <MairwunNx@gmail.com>

Author: MairwunNx

src/main/kotlin/com/mairwunnx/projectessentials/chat/EntryPoint.kt

@@ -171,6 +171,19 @@ class EntryPoint : EssBase() {
 
         if (mentions.isNotEmpty()) {
             if (mentionSettings.mentionsEnabled && mentionSettings.mentionInActionBar) {
+                if ("@all" in mentions) {
+                    event.player.server.playerList.players.forEach {
+                        it.sendStatusMessage(
+                            TextComponentUtils.toTextComponent {
+                                mentionSettings.mentionMessage.replace(
+                                    "%player",
+                                    event.player.name.string
+                                ).replace("&", "§")
+                            }, true
+                        )
+                    }
+                    return
+                }
                 event.player.server.playerList.players.forEach {
                     if ("@${it.name.string}" in mentions) {
                         it.sendStatusMessage(