chore(lang/js): make jco tutorial easier to run

Signed-off-by: Victor Adossi <vadossi@cosmonic.com>

Author: vados-cosmonic

.gitignore

@@ -6,3 +6,4 @@
 # Build artifacts from examples
 **/jco/bindings
 **/examples/**/*.wasm
+/component-model/examples/tutorial/jco/node_modules/

component-model/examples/tutorial/calculator/src/bindings.rs

@@ -1,4 +1,4 @@
 // See the README for details on *generation* of the required import
-import { calculate } from "./bindings/composed.js";
+import { calculate } from "./bindings/calculator.composed.js";
 
 console.log("Answer (to life) = " + calculate.evalExpression("add", 21, 21));