Legal and licenses

# Legal attribution CAD by Spanvision Infra is a rebranded distribution of the Open CAD Studio source supplied for this project. The original macOS package attributed © Hakan Seven. Copyright in the original work remains with Hakan Seven and other contributors, as applicable. Spanvision Infra branding identifies this distribution and its changes. The original Rust library name, `ocs_*` automation names, plugin ABI, legacy profile keys, and drawing metadata identifiers remain for compatibility. These identifiers do not represent the distributed product identity. The distribution's Cargo package and primary executable are `SpanvisionCAD`. The complete GNU General Public License version 3 text is in [LICENSE](LICENSE). Source-level notices and third-party licenses remain in their respective files. No default external font-download repository is configured. Fonts from user-selected sources retain their own licenses; see [fonts/README.md](fonts/README.md).