feat: add nvf and switch over to it

users/modules/programs/nvf.nix

@@ -0,0 +1,47 @@
+{ inputs, ... }: {
+  imports = [ 
+    inputs.nvf.homeManagerModules.default
+  ];
+
+  programs.nvf = {
+    enable = true;
+
+    settings.vim = {
+      options = {
+        # Indentation
+        autoindent = true;
+        smartindent = true;
+        expandtab = true;
+        smarttab = true;
+        wrap = false;
+        shiftwidth = 2;
+        tabstop = 2;
+        foldlevel = 1000; # Open all folds by default
+
+        # Search
+        hlsearch = true;
+        ignorecase = true;
+        incsearch = true;
+        smartcase = true; # case-sensitive if search contains uppercase
+
+        # Visual
+        number = true;
+        relativenumber = true;
+        cursorline = true;
+        visualbell = true;
+        termguicolors = true;
+
+        # Input
+        backspace = "indent,eol,start";
+      };
+      keymaps = [
+        {
+          key = "gf";
+          mode = "n";
+          action = ":cd %:p:h<CR>:e <cfile><CR>";
+          silent = true;
+        }
+      ];
+    };
+  };
+}