feat: add flake.nix

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1706371002,
+        "narHash": "sha256-dwuorKimqSYgyu8Cw6ncKhyQjUDOyuXoxDTVmAXq88s=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "c002c6aa977ad22c60398daaa9be52f2203d0006",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,28 @@
+{
+  description = "brain";
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+
+  outputs = inputs @ {
+    self,
+    nixpkgs,
+  }: let
+    inherit (nixpkgs.lib) genAttrs;
+    forAllSystems = f:
+      genAttrs
+      ["x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin"]
+      (system: f nixpkgs.legacyPackages.${system});
+  in {
+    devShells = forAllSystems (
+      pkgs:
+        with pkgs; {
+          default = mkShell {
+            buildInputs = [
+              fontforge
+              python3
+              pre-commit
+            ];
+          };
+        }
+    );
+  };
+}