refactor: move lib out of modules

lib/hm-module.nix

@@ -0,0 +1,44 @@
+# Home Manager module
+{
+  config,
+  pkgs,
+  lib ? pkgs.lib,
+  ...
+}: let
+  cfg = config.programs.neovim-flake;
+  set = pkgs.neovim-maximal {mainConfig = cfg.settings;};
+in
+  with lib; {
+    meta.maintainers = [maintainers.notashelf];
+
+    options.programs.neovim-flake = {
+      enable = mkEnableOption "A NeoVim IDE with a focus on configurability and extensibility.";
+
+      settings = mkOption {
+        type = types.attrsOf types.anything;
+        default = {};
+        example = literalExpression ''
+          {
+            vim.viAlias = false;
+            vim.vimAlias = true;
+            vim.lsp = {
+              enable = true;
+              formatOnSave = true;
+              lightbulb.enable = true;
+              lspsaga.enable = false;
+              nvimCodeActionMenu.enable = true;
+              trouble.enable = true;
+              lspSignature.enable = true;
+              rust.enable = false;
+              nix = true;
+            };
+          }
+        '';
+        description = "Attribute set of neoflake preferences.";
+      };
+    };
+
+    config = mkIf cfg.enable {
+      home.packages = [set.neovim];
+    };
+  }