- flake.nix: rebrand description, add Go 1.25, gopls, gotools,
staticcheck, golangci-lint, gnumake to all dev shells. Add a
plain `dev` shell (`nix develop .#dev`) that does not wrap the
shell in the bubblewrap sandbox so contributors can use a
standard Go toolchain.
- Dockerfile.dev: golang:1.22-bookworm with make, git, gopls and
staticcheck, /workspace as default cwd. CGO disabled.
- README: document both nix and Docker dev paths.
flake.lock is committed for reproducibility.
Closes#6.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
