minor #2709 [StimulusBundle] Make the JS package private (Kocal)

This PR was merged into the 2.x branch.

Discussion
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[StimulusBundle] Make the JS package private

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Docs?         | yes <!-- required for new features -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

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This PR follows #2708

The npm package ``@symfony`/stimulus-bundle` was accidentally published on npm when I was working on the "Symfony UX on NPM" project, but when I realized it was to late to unpublish it.

Today, I was able to unpublish the package from npm. I'm now making the package **private**, so it won't be released anymore (until a solution is implemented)

Commits
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f1b2ebf [StimulusBundle] Make the JS package private

Author: Kocal

src/StimulusBundle/assets/README.md

@@ -2,9 +2,10 @@
 
 JavaScript assets of the [symfony/stimulus-bundle](https://packagist.org/packages/symfony/stimulus-bundle) PHP package.
 
-This package is private and is not intended to be published on npm or installed.
+## Installation
 
-If you're looking for a npm package to integrate Stimulus in your Symfony application, you may be looking for the [`@symfony/stimulus-bridge`](https://www.npmjs.com/package/@symfony/stimulus-bridge) package.
+Due to compatibility issues with JSDelivr causing the package not to work as expected, the package is not yet released on NPM.
+Read more at [symfony/ux#2708](https://github.com/symfony/ux/issues/2708).
 
 ## Resources
 

src/StimulusBundle/assets/package.json

@@ -1,6 +1,7 @@
 {
     "name": "@symfony/stimulus-bundle",
     "description": "Integration of @hotwired/stimulus into Symfony",
+    "private": "true",
     "license": "MIT",
     "version": "2.24.0",
     "keywords": [