Add skeleton for arrays in IR

examples/array3.c

@@ -0,0 +1,13 @@
+int* foo(int a[10]){
+    return a;
+}
+
+int main() {
+    int a[10];
+    
+    for (int i = 0; i < 10; i++) {
+	    (foo(a))[i] = i;
+    }
+
+    return a[5] == 5;
+}