chore(nix): Create a flake to be able to run nvim with this config anywhere

flake.nix

@@ -0,0 +1,15 @@
+{
+  description = "My neovim configuration";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }: let
+    pkgs = import nixpkgs { system = "x86_64-linux"; };
+  in {
+    packages.x86_64-linux.default = pkgs.writeShellScriptBin "neovim-kalmenn" ''
+      ${pkgs.neovim}/bin/nvim -u ${let fs = pkgs.lib.fileset; in fs.toSource { root = ./.; fileset = fs.gitTracked ./.; }}/init.lua
+    '';
+  };
+}