refactor: implement component-based architecture for enhanced maintainability

- Reorganize directory structure into core/, features/, and themes/
- Colocate application Nix logic, configs, scripts, and theme overrides
- Implement 'Inversion of Control' for theming: apps now pull theme-specific layouts
- Update flake.nix and shared library paths to match the new structure
- Document the new Feature-Centric architecture in README.md

features/desktop/hyprland/config/looknfeel.conf

@@ -0,0 +1,34 @@
+# Change the default Nomarchy look'n'feel
+
+# https://wiki.hyprland.org/Configuring/Variables/#general
+general {
+    # No gaps between windows or borders
+    # gaps_in = 0
+    # gaps_out = 0
+    # border_size = 0
+
+    # Change to niri-like side-scrolling layout
+    # layout = scrolling
+}
+
+# https://wiki.hyprland.org/Configuring/Variables/#decoration
+decoration {
+    # Use round window corners
+    # rounding = 8
+
+    # Dim unfocused windows (0.0 = no dim, 1.0 = fully dimmed)
+    # dim_inactive = true
+    # dim_strength = 0.15
+}
+
+# https://wiki.hyprland.org/Configuring/Variables/#animations
+animations {
+    # Disable all animations
+    # enabled = no
+}
+
+# https://wiki.hypr.land/Configuring/Variables/#layout
+layout {
+    # Avoid overly wide single-window layouts on wide screens
+    # single_window_aspect_ratio = 1 1
+}