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/apps/alacritty/config/alacritty.toml

@@ -0,0 +1,25 @@
+general.import = [ "~/.config/nomarchy/current/theme/alacritty.toml" ]
+
+[env]
+TERM = "xterm-256color"
+
+[terminal]
+osc52 = "CopyPaste"
+
+[font]
+normal = { family = "JetBrainsMono Nerd Font", style = "Regular" }
+bold = { family = "JetBrainsMono Nerd Font", style = "Bold" }
+italic = { family = "JetBrainsMono Nerd Font", style = "Italic" }
+size = 9
+
+[window]
+padding.x = 14
+padding.y = 14
+decorations = "None"
+
+[keyboard]
+bindings = [
+{ key = "Insert", mods = "Shift", action = "Paste" },
+{ key = "Insert", mods = "Control", action = "Copy" },
+{ key = "Return", mods = "Shift", chars = "\u001B\r" }
+]

features/apps/alacritty/default.nix

@@ -0,0 +1,26 @@
+{ config, pkgs, lib, ... }:
+
+{
+  programs.alacritty = {
+    enable = lib.mkDefault true;
+    settings = lib.mkDefault {
+      env = {
+        TERM = "xterm-256color";
+      };
+      terminal = {
+        osc52 = "CopyPaste";
+      };
+      window = {
+        padding = { x = 14; y = 14; };
+        decorations = "None";
+      };
+      keyboard = {
+        bindings = [
+          { key = "Insert"; mods = "Shift"; action = "Paste"; }
+          { key = "Insert"; mods = "Control"; action = "Copy"; }
+          { key = "Return"; mods = "Shift"; chars = "\\u001B\\r"; }
+        ];
+      };
+    };
+  };
+}