* 🧑💻feat: update nix flake dev environment
- This removes installing `docker`, `rust-analyzer`, `rustfmt`
imperatively. `nodejs` is used to install dev dependencies
`stylelint-config-standard` and `postcss-lit`
- The `shellHook`s adds `rusty-hook` CLI to the PATH and the node
dev dependencies to the NODE_PATH.
* 📝 docs(developing): update NixOS dev environment setup
* fix: remove nonvital guide and improve grammar
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Co-authored-by: neon_arch <mustafadhuleb53@gmail.com>