Make Ruler look more like Xcode by creating custom font. Make ruler font and ruler Inset scale with text font size.

[Eliulm]

Description

This PR adds a customized SF Pro Font which aims to look like the Xcode Digits font. The ruler font and the ruler insets scale with the text font size.

Related Issues

• closes #58
• closes #157

Checklist

• [x] I read and understood the contributing guide as well as the code of conduct
• [x] The issues this PR addresses are related to each other
• [x] My changes generate no new warnings
• [x] My code builds and runs on my machine
• [x] My changes are all related to the related issue above
• [x] I documented my code

Screenshots

PointSize 13: Xcode left, CodeEdit Right:

PointSize 20: Xcode left, CodeEdit Right: