[funbiscuit]

Motivation

The SDF generation pipeline never needed freetype — only the glyph-outline front end does. As it stood, any project linking mist pulled in freetype and libc, which made it impossible to bake SDFs inside a wasm32-freestanding engine. This split separates the two so the generator can run anywhere, while the freetype front end stays available for normal font usage.

What

One package, two modules:

• mist — the full library, public API unchanged.
• mist-core — new module: the geometry files and the SDF pipeline, with zero dependencies.

The freetype frontend now works like any other consumer of the core: it decomposes glyph outlines through ShapeSink(font-agnostic moveTo/lineTo/quadTo/cubicTo/close ingestion) and calls core.generateSingle, which takes a caller-built shape plus em-unit advance/bearings instead of a codepoint.

Notes

• I've split the work into series of commits, each can be reviewed separately — can look at them as a series of small PRs.
• mist consumers still download the freetype tarball (dependencies are package-wide, same as today), but the C code is only compiled when the mist module is linked — mist-core alone never compiles C. Verified that the core builds for wasm32-freestanding with no libc.
• Text for this PR was structured with an LLM, but I've reviewed it and edited in some places.

[flut2]

LGTM, thanks for the PR