docs: create a README file

In thes commit `README.md` and `CHANGELOG.md` files are created.
`README` shows the purpose of this repository.

Author: DerekBum

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic
+Versioning](http://semver.org/spec/v2.0.0.html) except to the first release.
+
+## [Unreleased]
+
+### Added
+
+### Changed
+
+### Removed
+
+### Fixed

README.md

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+[![Go Reference][godoc-badge]][godoc-url]
+[![Code Coverage][coverage-badge]][coverage-url]
+
+# tlsdialer
+
+This package allows creating a TLS dialer for
+[`go-tarantool`](https://github.com/tarantool/go-tarantool).
+It serves as an interlayer between go-tarantool and go-openssl.
+
+go-tlsdialer uses tarantool connection, but also types and methods from 
+go-openssl.
+
+## Run tests
+
+To run a default set of tests:
+
+```go
+go test -v ./...
+```
+
+[godoc-badge]: https://pkg.go.dev/badge/github.com/tarantool/go-tlsdialer.svg
+[godoc-url]: https://pkg.go.dev/github.com/tarantool/go-tlsdialer
+[coverage-badge]: https://coveralls.io/repos/github/tarantool/go-tlsdialer/badge.svg?branch=master
+[coverage-url]: https://coveralls.io/github/tarantool/go-tlsdialer?branch=master