feat: add placeholder to check if a player has admin spy mode on or not

Author: darbyjack

src/main/java/me/glaremasters/guilds/guild/GuildHandler.java

@@ -571,7 +571,7 @@ public Inventory getGuildVault(Guild guild, int vault) {
      * @param player the player being checked
      * @return {@code true} if the player is a spy, {@code false} otherwise
      */
-    private boolean isSpy(@NotNull final Player player) {
+    public boolean isSpy(@NotNull final Player player) {
         return spies.contains(player);
     }
 

src/main/kotlin/me/glaremasters/guilds/placeholders/PlaceholderAPI.kt

@@ -185,6 +185,7 @@ class PlaceholderAPI(private val guildHandler: GuildHandler) : PlaceholderExpans
             "challenge_wins" -> guild.guildScore.wins.toString()
             "challenge_loses" -> guild.guildScore.loses.toString()
             "motd" -> guild.motd ?: ""
+            "spying" -> guildHandler.isSpy(player).toString()
             else -> ""
         }
     }