chore: add nix-shell configure for a minimal environment for development (#5175)

* chore: add nix-shell development environment

* chore: add rust-analyzer

* chore: use .envrc as a private file

.gitignore

@@ -47,6 +47,10 @@ benchmarks/data
 
 venv/
 
-# Fuzz tests 
+# Fuzz tests
 tests-fuzz/artifacts/
 tests-fuzz/corpus/
+
+# Nix
+.direnv
+.envrc

shell.nix

@@ -0,0 +1,22 @@
+let
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/nixos-unstable";
+  fenix = import (fetchTarball "https://github.com/nix-community/fenix/archive/main.tar.gz") {};
+  pkgs = import nixpkgs { config = {}; overlays = []; };
+in
+
+pkgs.mkShellNoCC {
+  packages = with pkgs; [
+    git
+    clang
+    gcc
+    mold
+    libgit2
+    protobuf
+    (fenix.fromToolchainFile {
+      dir = ./.;
+    })
+    fenix.rust-analyzer
+    cargo-nextest
+  ];
+
+}