Recognize all contributors to the InnerSource Patterns

It would be nice to recognize all contributors to our InnerSource Patterns in a public way.

A couple of ideas why that might be useful:

• people that have committed code to this repo are already visible here however that is a bit hidden
• there might be contributors that have helped in ways other than sending pull requests

Some tools I found:

• There is the allcontributors.org project that offers a way to recognize all contributors and list them in the README. They also have a bot 👍
• a github action with a slightly simpler idea to accomplish this https://github.com/marketplace/actions/contribute-list

Side note:

Listing all contributors in the book would be also nice (once we publish that :))

まず、リポジトリの README と、提案されている allcontributors.org および contribute-list のアプローチを確認します。コード以外で貢献する人も含め、コントリビューターをどのように収集して表示するかを決定します。完了の条件は、プロジェクトが維持管理されている場所でコントリビューターを公開に認識し、書籍での扱いについては別途対応することです。