Sort projects in order of difficulty

Description

Sort projects under each language in order of difficulty. Additionally, we can add the pre-requisite knowledge needed for each project.

Why

People mostly use these projects to get some hands-on experience with the language they're learning. Projects are the best way. However, beginners may find it overwhelming to figure out which project to start with. Of course, they can pick up any project they seem interested in but may get demotivated if it is too difficult.

Is this something you're interested in working on?

YES

issue では、ファイル、テスト、エントリーポイントのいずれも特定されていません。まず、プロジェクトがどのように表現され、言語ごとにグループ化されているかを確認し、次に難易度と前提知識の一貫した方式を定義してください。各言語のプロジェクトが順序付けられ、前提知識が記録されていれば完了です。