[chore] create basic readme file

Change-Id: Ia4e69e3a8d6ae5324c0e25a13175372369e2afe0

Author: xobotyi

README.md

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+<div align="center">
+
+# dev.gaijin.team/go/golib
+
+![Package Version](https://img.shields.io/github/v/release/GaijinEntertainment/golib?style=flat-square)
+![Go version](https://img.shields.io/github/go-mod/go-version/GaijinEntertainment/golib?style=flat-square)
+![GitHub Workflow Status (with branch)](https://img.shields.io/github/actions/workflow/status/GaijinEntertainment/golib/ci.yml?branch=master)
+![License](https://img.shields.io/github/license/GaijinEntertainment/golib?style=flat-square)
+
+</div>
+
+---
+
+## Overview
+
+Common Go libraries and utilities used in Gaijin Entertainment projects and shared with community.
+
+## Installation
+
+```bash
+go get dev.gaijin.team/go/golib
+```
+
+## Usage
+
+For packages documentation and examples, visit [pkg.go.dev](https://pkg.go.dev/dev.gaijin.team/go/golib).