Remaster: Spacing, kerning, general QA

[eweracs]

General remaster

• Spacing has been redone from scratch, keeping the same general rhythm as previously, but harmonising and straightening out inconsistencies.
• Kerning has been redone from scratch accordingly.
• QA includes: Outline QA (technical drawing quality), some design revisions as noted in the issues and commits, corrected metadata for functional exports in both static and variable fonts, character set revisions and harmonisation with Hubot Sans.

Furthermore, the following issues are fixed in this pull request:
#60
#64
#66
#67
#68

[tobiasahlin]

Thank you @eweracs ❤️ I'll add you to AUTHORS 🙏