Add simulation waveforms and measurement results

[ShiboSoftwareDev]

Summary

• add aligned piecewise-linear voltage and current source waveforms
• add multidimensional parameter-sweep coordinates
• add scalar measurement results with coordinate sets
• add optional display coordinates and units for physical-value sweeps

Validation

• bun test
• bun run build
• bun run lint:zod
• bun run check-snake-case
• npm pack --dry-run: the release tarball contains the new runtime schemas and declarations
• git diff --check

This PR has no dependency, workflow, bundler, package-script, or release-configuration changes.