Bump CMakePresets.json schema version to 2 for CMake Tools compatibility

[djkees]

Summary

Bump CMakePresets.json's schema version from 1 to 2 (and the accompanying cmakeMinimumRequired.minor from 19 to 20). Schema version 1 is deprecated by CMake, and VS Code's CMake Tools extension warns / can fail to load presets correctly against it.

Changes

• CMakePresets.json: version: 1 -> 2, cmakeMinimumRequired.minor: 19 -> 20. No preset behavior changes — schema v2 is backward compatible with the fields already in use here.

Testing

• Confirmed the fields already present in CMakePresets.json (configurePresets keys in use) are valid under CMake's schema v2 by checking against CMake's presets schema documentation. Did not execute a full local build of every preset as part of this PR — the change is a metadata-only version bump with no new or altered preset fields, so no build-behavior change is expected.

Compatibility / Numerical behavior

• No expected changes to numerical results
• Expected changes (explain and provide validation)

Build-configuration-only change; no solver, binding, or data-file code is touched.

---

Drafted with Claude's assistance.

• The schema version bump was checked against CMake's own presets schema documentation (v2 field/version requirements) rather than assumed compatible.