Fix packaging, timezone handling and HTML cleaning bugs

- Replace symfony 7.4.x-dev constraints with stable ranges so the
  package installs with minimum-stability stable
- Add the Cision facade referenced in composer.json and a config file
  (slug, timezone); the constructor now falls back to config('cision.slug')
- Convert feed timestamps with a real timezone instead of a hardcoded +2h,
  which was off by an hour during winter time
- Return false from fetchContent() when the request fails or the page
  has no article/heading, instead of throwing
- Fix italic paragraph detection, which never matched
- Fix literal '\n' in HtmlCleaner whitespace cleanup
- Normalize empty feed elements to empty strings
- Update README and add tests for the above

readme.md

@@ -24,12 +24,20 @@ A Laravel package for retrieving and parsing data from [Cision News](https://new
 composer require mattitjaab/laravel-cision-feed
 ```
 
-You may optionally set your Cision slug in your `.env`:
+Set your Cision newsroom slug in your `.env`:
 
 ```
 LARAVEL_CISION_FEED_SLUG=your-cision-slug
 ```
 
+Optionally publish the config file:
+
+```bash
+php artisan vendor:publish --tag="laravel-cision-feed-config"
+```
+
+Feed timestamps (`created_at`) are converted to `Europe/Stockholm` by default. Override with `LARAVEL_CISION_FEED_TIMEZONE`.
+
 ---
 
 ## Usage
@@ -37,7 +45,8 @@ LARAVEL_CISION_FEED_SLUG=your-cision-slug
 ```php
 use Mattitja\Cision\Cision;
 
-$cision = new Cision();
+$cision = new Cision();              // uses config('cision.slug')
+$cision = new Cision('other-company'); // or pass a slug explicitly
 
 // Fetch RSS entries
 $items = $cision->press(); // or ->news(), ->financial(), ->media()
@@ -50,6 +59,16 @@ echo $article['published_at']; // ISO timestamp
 echo $article['content'];      // Clean HTML
 ```
 
+Or use the facade:
+
+```php
+use Mattitja\Cision\Facades\Cision;
+
+$items = Cision::press();
+```
+
+All methods return `false` if the request fails or the response cannot be parsed.
+
 ---
 
 ## Testing
@@ -68,7 +87,7 @@ See [CHANGELOG](CHANGELOG.md) for recent changes.
 
 ## Contributing
 
-Contributions are welcome! Please see [CONTRIBUTING](CONTRIBUTING.md) for guidelines.
+Contributions are welcome! Please open an issue or pull request.
 
 ---