refactor config with better structure

home/dotfiles.nix

@@ -0,0 +1,31 @@
+{ ... }:
+{
+  # Desktop
+  xdg.configFile."niri" = {
+    force = true;
+    recursive = true;
+    source = ./config/niri;
+  };
+  xdg.configFile."fuzzel" = {
+    force = true;
+    recursive = true;
+    source = ./config/fuzzel;
+  };
+  # Shared with SDDM (nixos/desktop/sddm.nix); niri loads it from this path.
+  home.file."Pictures/Wallpapers/wallpaper.png" = {
+    force = true;
+    source = ../assets/wallpaper.png;
+  };
+
+  # Terminal
+  xdg.configFile."alacritty" = {
+    force = true;
+    recursive = true;
+    source = ./config/alacritty;
+  };
+  xdg.configFile."helix" = {
+    force = true;
+    recursive = true;
+    source = ./config/helix;
+  };
+}