chore: add orb lifecycle setup

[tetsuo-cpp]

Summary

• install LLVM/MLIR 20, CMake, Ninja, clang-format, and locked Python dependencies in fresh orbs
• configure the WarpForth CMake build and login-shell LLVM environment
• add a lightweight resume-time environment check
• use the default GNU linker so builds work consistently in login and non-login executor shells

Verification

• first setup: 25.64s
• idempotent second setup: 0.56s
• resume: 0.00s
• cmake --build build
• cmake --build build --target check-warpforth — 109/109 passed
• cmake --build build --target check-format
• uv run ruff check gpu_test/
• uv run ruff format --check gpu_test/