Add version metadata in step files (#38)

* Add version metadata in step files

* update

Author: MustafaMulla29

lib/index.ts

@@ -43,6 +43,7 @@ import {
 import { generateComponentMeshes } from "./mesh-generation"
 import { mergeExternalStepModels } from "./step-model-merger"
 import { normalizeStepNumericExponents } from "./step-text-utils"
+import { VERSION } from "./version"
 
 export interface CircuitJsonToStepOptions {
   /** Board width in mm (optional if pcb_board is present) */
@@ -113,8 +114,9 @@ export async function circuitJsonToStep(
   const productContext = repo.add(
     new ProductContext("", appContext, "mechanical"),
   )
+  const productDescription = `Generated by circuit-json-to-step v${VERSION}`
   const product = repo.add(
-    new Product(productName, productName, "", [productContext]),
+    new Product(productName, productName, productDescription, [productContext]),
   )
   const productDefContext = repo.add(
     new ProductDefinitionContext("part definition", appContext, "design"),

lib/version.ts

@@ -0,0 +1,4 @@
+import packageJson from "../package.json"
+
+// Read version from package.json to embed in generated STEP files
+export const VERSION = packageJson.version