feat(nix): enable Vim with custom configuration

- Enabled Vim in `default.nix` and added custom configuration under `programs.vim`.
- Includes settings for indentation, syntax highlighting, secure mode, and automatic cursor position restoration.
- Improves default usability and aligns with user preferences for Vim.

modules/home/cli-apps/home-manager/default.nix

@@ -27,6 +27,22 @@ in
       man = "${pkgs.bat-extras.batman}/bin/batman";
     };
 
-    home.packages = with pkgs; [ vim ];
+    programs.vim = {
+      enable = true;
+      extraConfig = ''
+        filetype indent off
+        set ts=4 sw=4 et sts=4
+        let spec_chglog_format = "%a %b %d %Y Harald Hoyer <harald@hoyer.xyz>"
+        set exrc
+        set secure
+        syntax on
+
+        " Restore cursor to last edit position
+        autocmd BufReadPost *
+          \ if line("'\"") >= 1 && line("'\"") <= line("$") |
+          \   exe "normal! g`\"" |
+          \ endif
+      '';
+    };
   };
 }