fix: avoid case-insensitive source directory collision - #40
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On case-insensitive filesystems, the Lean module directory
Blake3/and the cloned C source directoryblake3/resolve to the same path. Downstream Lake builds on macOS and Windows can therefore remove or overwrite the Lean sources while materializing the C implementation.Clone the upstream BLAKE3 sources into
blake3-source/instead. This keeps the existing build and API unchanged while allowing both directories to coexist.Tested with:
lake test