feat: Add readme and license

Add the basic readme and MIT license file.

README.md

@@ -0,0 +1,43 @@
+# Gitea API Client
+
+This package provides an API client for [Gitea](https://gitea.io) API Version 1.
+
+*Caution! This package is still under development*
+
+## Getting Started
+
+### Prerequisites
+
+This package has the following requirements:
+
+* PHP 7.2
+
+### Installing
+
+Install latest version via composer:
+
+```
+composer require avency/gitea
+```
+
+## Contributing
+
+Please read [CONTRIBUTING.md](https://github.com/avency/gitea//blob/master/CONTRIBUTING.md)
+for details on our code of conduct, and the process for submitting pull requests to us.
+
+## Versioning
+
+We use [SemVer](http://semver.org/) for versioning. For the versions available,
+see the [tags on this repository](https://github.com/avency/gitea/contributors).
+
+## Authors
+
+* Michael Gerdemann - [avency GmbH](https://www.avency.de)
+
+See also the list of [contributors](https://github.com/avency/gitea/graphs/contributors) who
+participated in this project.
+
+## License
+
+This project is licensed under the MIT License - see the
+[LICENSE.md](https://github.com/avency/gitea//blob/master/LICENSE.md) file for details