FontBakery Check Development for OT Shaping

[davelab6]

Similar to #4 @simoncozens has developed new FontBakery check for OT Shaping for an private nastaliq project:

• Checks expected vs actual shaping
• Checks for “forbidden” glyphs (e.g visible viramas, dotted circles, .notdef)
• Checks for glyph collisions
• Produces HTML report with SVG paths
• Integrates into CI
• Allows for test-driven layout development!

We should develop input data for this, for all Noto projects:

• expected shaping
• “forbidden” glyphs
• common glyph collisions