CODEGEN-787 - Improve handling of missing @parcel/watcher scenario (#10358)

* Remove error stacktrace when watcher is missing

* Add changeset

* Use warn instead of log

* Revert warn usage as it is the same for users. Improve message

Author: eddeee888

.changeset/tidy-cows-knock.md

@@ -0,0 +1,5 @@
+---
+'@graphql-codegen/cli': patch
+---
+
+Remove extraneous error stacktrace if fails to load `@parcel/watcher`

packages/graphql-codegen-cli/src/utils/watcher.ts

@@ -64,9 +64,9 @@ export const createWatcher = (
     let parcelWatcher: typeof import('@parcel/watcher');
     try {
       parcelWatcher = await import('@parcel/watcher');
-    } catch (err) {
+    } catch {
       log(
-        `Failed to import @parcel/watcher due to the following error (to use watch mode, install https://www.npmjs.com/package/@parcel/watcher):\n${err}`
+        'Failed to import @parcel/watcher.\n  To use watch mode, install https://www.npmjs.com/package/@parcel/watcher.'
       );
       return;
     }