feat: initial flake setup with flake-parts

Sets up a basic flake with flake-parts for modularity.

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1751413152,
+        "narHash": "sha256-Tyw1RjYEsp5scoigs1384gIg6e0GoBVjms4aXFfRssQ=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "77826244401ea9de6e3bac47c2db46005e1f30b5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1751271578,
+        "narHash": "sha256-P/SQmKDu06x8yv7i0s8bvnnuJYkxVGBWLWHaU+tt4YY=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "3016b4b15d13f3089db8a41ef937b13a9e33a8df",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1751159883,
+        "narHash": "sha256-urW/Ylk9FIfvXfliA1ywh75yszAbiTEVgpPeinFyVZo=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "14a40a1d7fb9afa4739275ac642ed7301a9ba1ab",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,20 @@
+{
+  inputs = {
+    # nixos-unstable provides a binary cache for all packages.
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    # flake-parts lets us define flake modules.
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs =
+    inputs@{ self, ... }:
+    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
+      imports = [ inputs.flake-parts.flakeModules.modules ];
+      systems = [ "x86_64-linux" ];
+      perSystem =
+        { pkgs, ... }:
+        {
+          packages.default = pkgs.hello;
+        };
+    };
+}