[opentype/fsselection] check if fsSelection bit for WWS is set correctly

[ollimeier]

What needs to be checked?

According to the opentype spec fsSelection bit 8 should be set if:
The font has 'name' table strings consistent with a weight/width/slope family without requiring use of name IDs 21 and 22.

Reference: https://learn.microsoft.com/en-us/typography/opentype/spec/os2#fsselection

Detailed description of the problem

I cannot find a test for that, so this would be a new check.

Resources and steps needed to reproduce the problem

Have a font, without name ID 21 and 22

Suggested profile

Suggest which profile the check should be added to. The most common are:

• Vendor-specific: Google Fonts
• Vendor-specific: Adobe Fonts
• OpenType (requirements imposed by the OpenType specification)
• Universal (broadly accepted best practices on the type design community)
• Other:

Suggested result

Which log result level should the check have:

• 🔥 FAIL (An issue that must be corrected for the font to function properly)
• ⚠️ WARN (A potential issues that may need to be addressed)

[ollimeier]

Some more context from the OpenType Spec:
IF a face differs within its family only in terms of weight, width or slope attributes, then bit 8 should be set. This applies even if the face is part of a large family that includes other faces distinguished by other attributes. Setting bit 8 serves as an indicator to apps that assume the WWS model that name IDs 1 and 2 or IDs 16 and 17 are consistent with the WWS model and no further treatment is required, including checking to see whether name IDs 21 and 22 are present. Hence, when bit 8 is set, name IDs 21 and 22 are never required and should not be included.