Added chat command

data/canopy/advancements/chat_advancement.json

@@ -0,0 +1,18 @@
+{
+    "display": {
+        "icon": {
+            "item": "minecraft:spruce_door"
+        },
+        "title": "Secret Club",
+        "description": "What's the password?",
+        "frame": "challenge",
+        "hidden": true,
+	"announce_to_chat": true
+    },
+    "parent": "canopy:root",		
+    "criteria": {
+	"say_the_password": {
+		"trigger": "impossible"
+	}
+    }
+}