Add initial readme

readme.md

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+# Ciris
+
+[![Typelevel](https://img.shields.io/badge/typelevel-library-fd3d50.svg)](https://typelevel.org/projects/#ciris)
+[![GitHub Actions](https://img.shields.io/github/actions/workflow/status/vlovgr/ciris/ci.yml?branch=master)](https://github.com/vlovgr/ciris/actions)
+[![Discord](https://img.shields.io/discord/632277896739946517?color=5865f2)](https://discord.gg/XF3CXcMzqD)
+[![Version](https://img.shields.io/maven-central/v/is.cir/ciris_3?label=version&color=orange)](https://index.scala-lang.org/vlovgr/ciris)
+
+Functional, lightweight, and composable configuration loading for Scala.<br>
+Please continue to the [microsite](https://cir.is) for documentation and more information.