Reflect that wasm32-unknown-unknown is provided by the Nix dev shell
via rust-overlay rather than requiring a manual rustup install. Include
the Cargo.lock generated by building the common crate.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Set up mono-repo foundation with CLAUDE.md conventions, base Nix flake
(Rust + wasm32 target, Trunk, OpenTofu, wrangler, SQLx, Turso), shared
common library crate, dual Apache-2.0/MIT licenses, .gitignore, and
repo-level README.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>