added addon as plugin to simplefy gdscript user code

project/addons/discord-rpc-gd/loadaddon.gd

@@ -0,0 +1,11 @@
+extends Node
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	DiscordSDK.update()