feat: rust project initialization

flake.nix

@@ -0,0 +1,57 @@
+{
+  inputs = {
+    nixpkgs.url = "github:cachix/devenv-nixpkgs/rolling";
+    flake-utils.url = "github:numtide/flake-utils";
+    alejandra = {
+      url = "github:kamadorueda/alejandra/4.0.0";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    devenv = {
+      url = "github:cachix/devenv";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    devenv-root = {
+      url = "file+file:///dev/null";
+      flake = false;
+    };
+  };
+
+  nixConfig = {
+    extra-trusted-public-keys = [
+      "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="
+    ];
+    extra-substituters = [
+      "https://devenv.cachix.org"
+    ];
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    rust-overlay,
+    alejandra,
+    ...
+  } @ inputs:
+    flake-utils.lib.eachDefaultSystem (
+      system: let
+        overlays = [(import rust-overlay)];
+        pkgs = import nixpkgs {inherit system overlays;};
+        rustVersion = pkgs.rust-bin.stable.latest.default;
+        rustPlatform = pkgs.makeRustPlatform {
+          cargo = rustVersion;
+          rustc = rustVersion;
+        };
+      in {
+        formatter = alejandra.defaultPackage.${system};
+        packages = import ./nix/package.nix {inherit pkgs rustPlatform;};
+        devShell = import ./nix/shell.nix {
+          inherit inputs pkgs self rustVersion system;
+        };
+      }
+    );
+}