feat: add dotfiles submodule and home-manager config

- Add dotfiles repo as submodule in assets/dotfiles/
- Rewrite home.nix with direct file references instead of stow service
- Remove old custom dotfiles.nix service (replaced by home-manager)
- Clean up services/default.nix import

users/gortium/home.nix

@@ -1,12 +1,63 @@
-{ pkgs, ... }: {
-  services.dotfiles = {
-    enable = true;
-    stowDir = ../../../assets/dotfiles;
-    user = "gortium";
-  };
+{ pkgs, lib, config, inputs, ... }:
 
+let
+  dotfiles = ./assets/dotfiles;
+in {
   home.username = "gortium";
   home.homeDirectory = "/home/gortium";
-  home.stateVersion = "23.11"; # Please change this to your version.
+  home.stateVersion = "23.11";
   programs.home-manager.enable = true;
+
+  home.file = {
+    # zsh
+    ".zshrc".source = "${dotfiles}/zsh/.zshrc";
+
+    # tmux
+    ".tmux.conf".source = "${dotfiles}/tmux/.tmux.conf";
+
+    # kitty
+    ".config/kitty/kitty.conf".source = "${dotfiles}/kitty/.config/kitty/kitty.conf";
+
+    # nvim
+    ".config/nvim/init.lua".source = "${dotfiles}/nvim/.config/nvim/init.lua";
+
+    # starship
+    ".config/starship.toml".source = "${dotfiles}/starship/.config/starship.toml";
+
+    # btop
+    ".config/btop/btop.conf".source = "${dotfiles}/btop/.config/btop/btop.conf";
+
+    # waybar
+    ".config/waybar/style.css".source = "${dotfiles}/waybar/.config/waybar/style.css";
+    ".config/waybar/config.jsonc".source = "${dotfiles}/waybar/.config/waybar/config.jsonc";
+
+    # wofi
+    ".config/wofi/style.css".source = "${dotfiles}/wofi/.config/wofi/style.css";
+    ".config/wofi/config".source = "${dotfiles}/wofi/.config/wofi/config";
+
+    # yazi
+    ".config/yazi/yazi.toml".source = "${dotfiles}/yazi/.config/yazi/yazi.toml";
+
+    # hyprland
+    ".config/hypr/hyprland.conf".source = "${dotfiles}/hypr/.config/hypr/hyprland.conf";
+
+    # doom emacs
+    ".config/doom/config.el".source = "${dotfiles}/doom/.config/doom/config.el";
+    ".config/doom/init.el".source = "${dotfiles}/doom/.config/doom/init.el";
+    ".config/doom/packages.el".source = "${dotfiles}/doom/.config/doom/packages.el";
+  };
+
+  home.packages = with pkgs; [
+    # core
+    git zsh tmux starship
+    # editors
+    neovim kitty
+    # tools
+    btop yazi ripgrep fd fzf
+    # wayland
+    waybar wofi
+  ];
+
+  programs.zsh.enable = true;
+  programs.starship.enable = true;
 }