add Hole and Template skeleton

server/test/test_statement.lean

@@ -1,4 +1,5 @@
 import GameServer.Commands
+--import
 
 Game "Test"
 World "TestW"
@@ -6,5 +7,21 @@ Level 1
 
 LemmaDoc add_zero as "add_zero" in "Nat" "(nothing)"
 
-Statement add_zero (attr := simp, to_additive) "test" (n : Nat) : n + 0 = n := by
-  rfl
+@[simp] Statement add_zero "test" (n : Nat) : n + n = n := by
+  sorry
+
+Statement (n : Nat) : 0 + n = n := by
+  Template
+    induction n
+    Hole
+      simp
+    simp
+
+NewLemma add_zero
+
+--attribute [simp] add_zero
+
+#print add_zero
+
+theorem xy (n : Nat) : n + n = n := by
+  simp