Type in the initial README

Author: Vectorial1024

CHANGELOG.md

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+# Change Log of `laravel-process-async`
+
+## Dev (WIP)
+- ...

README.md

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 # laravel-process-async
-Utilize Laravel Process to run PHP code asynchronously.
+Utilize Laravel Processes to run PHP code asynchronously.
+
+## What really is this?
+[Laravel Processes](https://laravel.com/docs/10.x/processes) was first introduced in Laravel 10. This library wraps around `Process::start()` to let you execute code in the background to achieve async, albeit with some caveats:
+- You may only execute PHP code
+- Restrictions from SC apply (see)
+- Silent execution: no built-in result-checking, check the results yourself (e.g. via database)
+
+## Installation
+(WIP)
+
+## Change log
+Please see `CHANGELOG.md`.
+
+## Example code
+(WIP)
+
+## Testing
+PHPUnit via Composer script:
+```sh
+composer run-script test
+```