Add Hebrew to `glyphsets/GF_glyphsets`?

Is there a reason there isn't a Hebrew section in [glyphsets/GF_glyphsets](https://github.com/googlefonts/glyphsets/tree/main/GF_glyphsets)?

Start by inspecting the existing sections in glyphsets/GF_glyphsets and compare how other writing systems are represented. Determine whether Hebrew should be added and what glyph coverage or naming requirements apply; done means the project has an agreed Hebrew section or a documented reason not to add one.

Written by the indexing model from the issue text.