Add Display Italic style

[MaghSamana]

Hello, just dropping an idea, for more styles in the future.

[alerque]

I understand where this desire comes from, but there is no way I'm going to sit around and draw more styles like this. I wouldn't refuse contributions if somebody does a good job of drawing them, but I don't think it will happen.

But all hope is not lost, rather than draw specific missing styles another approach is to remaster the existing styles in such a way they could be interpolated. This would completely eliminate the need to draw more Semibold styles. See #56.

I'm not exactly sure where the Display face would fit into that project, so I'll keep this issue open to consider that ... but the semibold style requests are a "no" unless we figure out how to back a variable font remastering.

[KrasnayaPloshchad]

This could be done via adidng itlc feature.

[alerque]

Say what @KrasnayaPloshchad? I've heard of implementing italic fonts using the ital feature to substitute glyphs in a single font face instead of having a separate faces for Roman and Italic, but I've never heard of itlc and don't know how it would solve the problem of not having drawn Italics to match the Display style at all.

[KrasnayaPloshchad]

Sorry I’ve wrong impression on it. Yes you’re right that italic fonts could using the ital feature, itlc is an axis of variable font.