feat: Display the deployed package in the repository

[akirataguchi115]

Summary

Display the deployed package in the repository

Motivation

The developer who stumbles upon this repository sees immediately that jekyll is offered as a published package rather than compiling from the source or as executables.

Guide-level explanation

Use the documentation provided by GitHub to show the released package in the repository: https://docs.github.com/en/packages

Drawbacks

This could eat space from the home screen. For example I can't see without scrolling the Deployments and Languages section without scrolling on my QHD screen.

Unresolved Questions

The Packages section could also be disabled for clarity but it would seem silly since jekyll is indeed provided as a package through gems.