Add a README for this repository.

README.md

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+# pico
+
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/tuxdude/pico)](https://pkg.go.dev/github.com/tuxdude/pico) [![Build](https://github.com/Tuxdude/pico/actions/workflows/build.yml/badge.svg)](https://github.com/Tuxdude/pico/actions/workflows/build.yml) [![Tests](https://github.com/Tuxdude/pico/actions/workflows/tests.yml/badge.svg)](https://github.com/Tuxdude/pico/actions/workflows/tests.yml) [![Lint](https://github.com/Tuxdude/pico/actions/workflows/lint.yml/badge.svg)](https://github.com/Tuxdude/pico/actions/workflows/lint.yml) [![CodeQL](https://github.com/Tuxdude/pico/actions/workflows/codeql-analysis.yml/badge.svg)](https://github.com/Tuxdude/pico/actions/workflows/codeql-analysis.yml) [![Go Report Card](https://goreportcard.com/badge/github.com/tuxdude/pico)](https://goreportcard.com/report/github.com/tuxdude/pico)
+
+A go library with the core business logic for the
+[`picoinit`](https://github.com/Tuxdude/picoinit) init system, used to
+manage multiple processes (aka services) within a docker container.
+
+[`picoinit`](https://github.com/Tuxdude/picoinit) aims to be a minimal
+init and multi-service manager for Docker containers written in go.