Move flake-modules to modules2

Move flake-modules to modules2 so they are automatically imported by
import-tree.

modules2/dev-shell.nix

@@ -0,0 +1,14 @@
+{
+  perSystem =
+    { pkgs, ... }:
+    {
+      devShells.default = pkgs.mkShell {
+        packages = with pkgs; [
+          just
+          lua-language-server
+          lua54Packages.luacheck
+          nixd
+        ];
+      };
+    };
+}

modules2/formatting.nix

@@ -0,0 +1,7 @@
+{
+  perSystem =
+    { pkgs, ... }:
+    {
+      formatter = pkgs.nixfmt-rfc-style;
+    };
+}

modules2/nixos-configurations.nix

@@ -0,0 +1,47 @@
+{ inputs, self, ... }:
+
+{
+  flake =
+    let
+      inherit (self) outputs;
+
+      specialArgs = {
+        inherit inputs outputs self;
+
+        system = "x86_64-linux";
+        username = "opdavies";
+      };
+
+      mkNixosConfiguration =
+        {
+          hostname,
+          stateVersion ? "22.11",
+          system ? "x86_64-linux",
+        }:
+        inputs.nixpkgs.lib.nixosSystem {
+          inherit system;
+
+          modules = [ "${self}/hosts/${hostname}/configuration.nix" ];
+
+          specialArgs = specialArgs // {
+            inherit hostname stateVersion system;
+          };
+        };
+    in
+    {
+      nixosConfigurations = {
+        lemp11 = mkNixosConfiguration { hostname = "lemp11"; };
+
+        nixedo = mkNixosConfiguration {
+          hostname = "nixedo";
+          stateVersion = "24.11";
+        };
+
+        t480 = mkNixosConfiguration { hostname = "t480"; };
+
+        t490 = mkNixosConfiguration { hostname = "t490"; };
+
+        PW05CH3L = mkNixosConfiguration { hostname = "PW05CH3L"; };
+      };
+    };
+}

modules2/packages.nix

@@ -0,0 +1,17 @@
+{ self, ... }:
+
+{
+  perSystem =
+    { inputs', pkgs, ... }:
+    {
+      packages = {
+        default = pkgs.mkShell { buildInputs = with pkgs; [ just ]; };
+
+        neovim = inputs'.nixvim.legacyPackages.makeNixvimWithModule {
+          inherit pkgs;
+
+          module = import "${self}/modules/home-manager/neovim/config";
+        };
+      };
+    };
+}