dev: add flake.nix and .envrc for Rust dev environment

- rust-overlay for stable toolchain + rust-src + rust-analyzer
- pkg-config, openssl, sqlite for reqwest + ownership DB
- cargo-watch, cargo-nextest for dev workflow
- direnv integration via .envrc
This commit is contained in:
Ciphercat 2026-03-05 16:23:49 +00:00
commit d457c630c4
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.envrc Normal file
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use flake