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

themes/palettes/catppuccin-latte/colors.toml

@@ -0,0 +1,23 @@
+accent = "#1e66f5"
+cursor = "#dc8a78"
+foreground = "#4c4f69"
+background = "#eff1f5"
+selection_foreground = "#eff1f5"
+selection_background = "#dc8a78"
+
+color0 = "#bcc0cc"
+color1 = "#d20f39"
+color2 = "#40a02b"
+color3 = "#df8e1d"
+color4 = "#1e66f5"
+color5 = "#ea76cb"
+color6 = "#179299"
+color7 = "#5c5f77"
+color8 = "#acb0be"
+color9 = "#d20f39"
+color10 = "#40a02b"
+color11 = "#df8e1d"
+color12 = "#1e66f5"
+color13 = "#ea76cb"
+color14 = "#179299"
+color15 = "#6c6f85"