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Update Harfbuzz implementation; upgrade to Unicode 17#224

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benoitkugler wants to merge 27 commits intomainfrom
harfbuzz-upstream
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Update Harfbuzz implementation; upgrade to Unicode 17#224
benoitkugler wants to merge 27 commits intomainfrom
harfbuzz-upstream

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@benoitkugler
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This PR ports the latest changes in the Harfbuzz C++ implementation (roughly v12.3.0).
It also bump our Unicode version to 17, and upgrade our Unicode Line Breaking implementation (in the segmenter package).

There is no API change, expect for a change in the method Face.GlyphVOrigin whose signature is now GlyphVOrigin(glyph GID) (x, y float32). This method is essentially used internally in Harfbuzz, and this change should not affect end users.

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Superseded by #225

@benoitkugler benoitkugler deleted the harfbuzz-upstream branch February 3, 2026 13:36
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