hugr-model: v0.15.0

Bug Fixes

• Ignare lint warnings in capnproto generated code (#1728)

New Features

• Export/import of JSON metadata (#1622)
• Emulate TypeBounds on parameters via constraints. (#1624)
• Lists and extension sets with splicing (#1657)
• [breaking] Have CustomTypes reference their Extension definition (#1723)

Performance

• Faster singleton SiblingSubgraph construction (#1654)