Add initial implementation of `meta` compilation

[Hoolean]

Hello!

This PR begins implementation of meta table compilation for the Glyphs and UFO formats. This is a larger end-to-end implementation than my previous PRs, and so I am making an early draft to work on it publicly to make sure that it can be shaped from the beginning, and that it stays on track; all feedback and contributions welcome :)

Implemented

• Full happy path
• Produces an identical meta table for the top few fontc_crater reports

TODO

• [ ] Confirm semantics of Glyphs custom parameter (Glyphs.app vs glyphsLib)
• [ ] Confirm approach for StateSet construction in glyphs2fontir
• [ ] Make error handling idiomatic to this project (no expect(...), no type conversion clutter, etc)
• [x] Rebase on main
• [x] Wait for fontations release that includes https://github.com/googlefonts/fontations/pull/1244
• [x] Fix lints
• [x] Fix failing tests
• [ ] Add tests (!)

(most of these are also flagged as inline TODOs, to be resolved before merge)

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Will implement #1113

_{Note: this is a personal contribution independent of my employer, and so I've submitted from a fork under my personal profile and email to make this distinction}

[Hoolean]

(rebased on main to adapt for #1131 and to use full fontations release instead of bleeding edge git reference)