Add Discord RPC service

Add injectable Discord RPC service that will broadcast Discord events
through event bus and have API for setting Discord Rich Presence status.

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

runelite-client/src/main/java/net/runelite/client/RuneLite.java

@@ -32,18 +32,18 @@ import com.google.inject.Injector;
 import java.applet.Applet;
 import java.io.File;
 import java.util.Optional;
-import java.util.concurrent.ScheduledExecutorService;
 import javax.inject.Singleton;
 import javax.swing.SwingUtilities;
 import joptsimple.OptionParser;
 import joptsimple.OptionSet;
 import lombok.extern.slf4j.Slf4j;
 import net.runelite.api.Client;
-import net.runelite.client.events.ClientUILoaded;
 import net.runelite.client.account.SessionManager;
 import net.runelite.client.chat.ChatMessageManager;
 import net.runelite.client.config.ConfigManager;
 import net.runelite.client.config.RuneLiteConfig;
+import net.runelite.client.discord.DiscordService;
+import net.runelite.client.events.ClientUILoaded;
 import net.runelite.client.menus.MenuManager;
 import net.runelite.client.plugins.PluginManager;
 import net.runelite.client.ui.ClientUI;
@@ -78,9 +78,6 @@ public class RuneLite
 	@Inject
 	private ChatMessageManager chatMessageManager;
 
-	@Inject
-	private ScheduledExecutorService executor;
-
 	@Inject
 	private OverlayRenderer overlayRenderer;
 
@@ -90,6 +87,9 @@ public class RuneLite
 	@Inject
 	private RuneLiteConfig runeliteConfig;
 
+	@Inject
+	private DiscordService discordService;
+
 	Client client;
 	ClientUI gui;
 	Notifier notifier;
@@ -133,6 +133,9 @@ public class RuneLite
 		// Load swing UI
 		SwingUtilities.invokeAndWait(() -> setGui(ClientUI.create(properties, client)));
 
+		// Initialize Discord service
+		discordService.init();
+
 		// Load default configuration
 		configManager.load();