feat: some neovim customizaion

modules/nvim.nix

@@ -0,0 +1,43 @@
+{pkgs, ...}: {
+  programs.nixvim = {
+    enable = true;
+    globals.mapleader = " ";
+
+    opts = {
+      relativenumber = true;
+    };
+
+    colorschemes.ayu.enable = true;
+
+    autoCmd = [
+      {
+        event = "BufWritePre";
+        pattern = "*.nix";
+        callback = {
+          __raw = "function(args) require('conform').format({ bufnr = args.buf }) end";
+        };
+      }
+    ];
+
+    plugins.nix.enable = true;
+    plugins.treesitter.enable = true;
+    plugins.lspconfig.enable = true;
+    plugins.blink-cmp.enable = true;
+    plugins.telescope.enable = true;
+
+    plugins.conform-nvim = {
+      enable = true;
+
+      settings = {
+        formatters_by_ft = {
+          nix = ["alejandra"];
+        };
+      };
+    };
+    lsp.servers.nil_ls.enable = true;
+  };
+
+  users.users.prever.packages = [
+    pkgs.alejandra
+  ];
+}