formart Readme and add Download Links

Readme.md

 # Symfony API Documentation Generator
+
 This is a simple .NET CLI tool, which parses a JSON file and returns the annotations needed for the `NelmioApiDocBundle`.
 
 ## Usage
+
 Open the Application from the CLI, then paste your JSON and press two times return. Now you get the Annotations matching your JSON. Please note values with null won't get any type.
 
+## Downloads
+
+* [Linux](https://gitlab.jonasled.de/jonasled/symfony-api-doc-generator/-/jobs/artifacts/master/download?job=build:linux)
+* [Windows](https://gitlab.jonasled.de/jonasled/symfony-api-doc-generator/-/jobs/artifacts/master/download?job=build:windows)
+* [MacOS (Intel only)](https://gitlab.jonasled.de/jonasled/symfony-api-doc-generator/-/jobs/artifacts/master/download?job=build:macos)
+
 ## Example
+
 ### Input
+
 ```json
 {
   "id": 4051,
@@ -54,8 +64,10 @@ Open the Application from the CLI, then paste your JSON and press two times retu
   ]
 }
 ```
+
 ### Output
-```
+
+```php
 * @OA\JsonContent(
 *   type="object",
 *   @OA\Property(