Homebrew 4D Game Engine In Rust, inspired by Engine4D

ci: add production gate and project workflow skills

- GitHub Actions CI: fmt, clippy -D warnings, rustdoc -D warnings, workspace tests - 4d-geometry skill: Mesh4D/watertightness/prism-splitting workflow - headless-visual-verification skill: shape_showcase + invariant capture workflow - production-readiness skill: final PR/release checklist


Author sigilzero.dev
Date Commit Parent ed968b96
+222
4 changed files
+222
4 changed files