By: Tom Sydney Kerckhove <syd@cs-syd.eu>
build: add a nix flake Builds and tests the crates that do not need the CUDA toolkit, using the nightly pinned in rust-toolchain.toml, plus a clippy check and a devShell. Claude-Session: https://claude.ai/code/session_015NS3w2sDh3yXJaJ2udvo2n
| Time to Start | Worker time | Duration | Time to finish | Idle | |
| Config | 1m29s | 2s | 2s | 1m32s | 1m29s |
| Eval | 1m32s | 15s | 15s | 1m47s | 0s |
| Build | 1m47s | 2m11s | 15m46s | 17m33s | 13m34s |
| Suite | 1m29s | 2m30s | 16m04s | 17m33s | 15m03s |