Greptile Summary

This PR fixes Nix packaging by splitting the legacy name attribute into separate pname and version fields (as required by modern buildRustPackage), removing allowBuiltinFetchGit (safe since Cargo.lock has no git-sourced dependencies), and injecting VERGEN_GIT_DESCRIBE / VERGEN_BUILD_DATE env vars so the binary reports a consistent version string at build time. It also adds /result to .gitignore to stop the Nix build symlink from being tracked.

• package.nix: name → pname + version, cargoLock simplified, env block added for VERGEN variables.
• .gitignore: /result added to suppress the nix build output symlink from being committed.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["nix build"] --> B["rustPlatform.buildRustPackage"]
    B --> C["Fetch src = ./."]
    C --> D["Resolve cargoLock.lockFile = ./Cargo.lock"]
    D --> E["Set env vars\nVERGEN_GIT_DESCRIBE=dev\nVERGEN_BUILD_DATE=unknown"]
    E --> F["cargo build --release"]
    F --> G["/nix/store/...-gitv-dev\n  bin/gitv"]
    G --> H["result symlink\n(ignored by .gitignore)"]

_{Reviews (5): Last reviewed commit: "fix: nix packaging" | Re-trigger Greptile}

I removed cargoLock.allowBuiltinFetchGit from the package because it is not needed for gitv :P