fix(neovim): add expandtab and respect editorconfig

We also added an editorconfig with this one in the repository

.editorconfig

@@ -0,0 +1,5 @@
+[*]
+indent_style = tab
+indent_size = 2
+trim_trailing_whitespaces = true
+insert_final_newline = true

modules/nixos/cli/neovim/default.nix

@@ -28,6 +28,7 @@ in
           options = {
             tabstop = 2;
             shiftwidth = 2;
+            expandtab = false;
             cursorlineopt = "screenline";
           };
 

modules/nixos/cli/neovim/editorconfig/default.nix

@@ -0,0 +1,3 @@
+{
+  programs.nvf.settings.vim.editorconfig.enable = true;
+}