feat: Initialize the project

Signed-off-by: Awiteb <a@4rs.nl>

flake.nix

@@ -0,0 +1,39 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs =
+    {
+      nixpkgs,
+      rust-overlay,
+      flake-utils,
+      ...
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        overlays = [ (import rust-overlay) ];
+        pkgs = import nixpkgs { inherit system overlays; };
+      in
+      with pkgs;
+      {
+        devShells.default = mkShell {
+          packages = [
+            just
+            cargo-msrv
+            git-cliff
+          ];
+
+          nativeBuildInputs = [
+            (lib.hiPrio rust-bin.nightly."2025-04-30".rustfmt)
+            rust-bin.stable.latest.default
+          ];
+
+          buildInputs = [ ];
+        };
+      }
+    );
+}