By: Tom Sydney Kerckhove <syd@cs-syd.eu>
Add a Nix flake for fast, incrementally-cached CI Builds bombadil with crane and the oxalica rust-overlay (x86_64-linux): - default/static-musl/aarch64-musl CLI binaries, the wasm inspect UI, the npm package, plus clippy, rustfmt and the test suite as checks. - A single shared dependency derivation whose source is reduced by crane to cargo metadata only, so editing source code never rebuilds dependencies. See nix/experiments/deps-cache-stability.sh for a runnable proof. - wasm-bindgen-cli pinned to 0.2.125 to match the wasm-bindgen crate. nix flake check builds everything; this is what NixCI runs.