Modernize examples for openFrameworks 0.12.1

[daitomanabe]

Summary

• update all six applications, Makefiles, and Xcode projects for openFrameworks 0.12.1
• harden ofxBvh parsing and playback boundaries, with malformed-input and lifecycle regression coverage
• keep every application runnable from a clean checkout through bundled BVH fallbacks and a silent internal clock
• vendor the historical ofxMarchingCubes dependency with provenance, LGPL notices, and safety fixes
• document perfume-dev stewardship, collaborative authorship, component licenses, and historical sources
• add pinned macOS CI plus Xcode project-structure validation

Credit

Incorporates the end-of-playback safety issue reported in #2; thanks @MorimasaAketa. Carries forward data-layout documentation from #1; thanks @lan-yung-luen. Original and third-party authorship remains documented in CONTRIBUTORS.md, per-component licenses, vendored notices, and Git history.

Verification

• all six Makefile Release builds with the official openFrameworks 0.12.1 macOS release
• all six Xcode Release builds
• ofxBvh boundary and malformed-input regression tests
• ofxMarchingCubes lifecycle and finite-value regression tests
• Xcode project validation, workflow linting, YAML and shell syntax checks
• privacy and copyright scans

The original full Perfume audio and motion assets are not part of this repository. Runtime checks therefore used the bundled fallback motion files and silent-clock mode.