Setting for rulers on all 4 edges of the viewport

By default the ruler is viewed on the top and left border of the screen. I wish to have it on the bottom or right of the screen in addition incase I need to measure specific length from things designed from the bottom up. In my specific case I am drafting containers with varying width and volumes and only having the ruler at the top forces me to either drag the view cutting off most of the workspace, or play around with flips and rotations essentially designing upside down. Including a full perimeter ruler would address my issue.

Issue にはファイル、テスト、エントリーポイントが記載されていないため、まず viewport ruler の実装とそのレイアウト処理を見つけます。既存の上側と左側の ruler を維持したまま、下側と右側にオプションの ruler を追加し、4 つすべての端から測定できることを確認します。

索引モデルが issue の本文から書いたものです。