feat: initial commit

New neovim configuration, a continuation from
a1a9da1ddc,
but based on Nix as the plugin/package manager. With a wrapped neovim
instance, for better portability.

flake.nix

@@ -0,0 +1,38 @@
+{
+  description = "My development environment";
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    neovim-nightly-overlay.url = "github:nix-community/neovim-nightly-overlay";
+  };
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }@inputs: let
+    systems = [
+      "x86_64-linux"
+      "aarch64-linux"
+      "x86_64-darwin"
+      "aarch64-darwin"
+    ];
+      overlays = [
+        inputs.neovim-nightly-overlay.overlays.default
+      ];
+    forAllSystems = f: nixpkgs.lib.genAttrs systems (system: let
+      pkgs = import nixpkgs {inherit system overlays;};
+    in
+      f system pkgs);
+  in {
+    packages = forAllSystems (system: pkgs: {
+      neovim = self.packages.${system}.default;
+      default = (pkgs.callPackage ./neovim.nix {});
+    });
+    devShells = forAllSystems (system: pkgs: {
+      default = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          stylua
+        ];
+      };
+    });
+  };
+}