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/hyprsunset.conf

@@ -0,0 +1,14 @@
+# Makes hyprsunset do nothing to the screen by default
+# Without this, the default applies some tint to the monitor
+profile {
+    time = 07:00
+    identity = true
+}
+
+# To enable auto switch to nightlight, set in your .config/hypr/autostart:
+# exec-once = uwsm app -- hyprsunset
+# and use the following:
+# profile {
+#     time = 20:00
+#     temperature = 4000
+# }