The DWG/DXF/ACIS codec now lives in its own crate and acadifc re-exports
it alongside the geometry kernel, so this is the single dependency:
OpenCADStudio -> acadifc -> { cadcodec, cadkernel }
acadifc is aliased to `acadrust`, which leaves the 2569 `use acadrust::…`
paths across 253 files untouched — the alias is a manifest-level rename,
not a source change.
The old `[patch.crates-io]` entry goes away with it: the dependency is a
git revision now rather than a crates.io version being redirected.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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