feat: implement modular foundation and core system services

- Update flake.nix with 25.11 release and core inputs
- Add dedicated modules for audio (Pipewire), bluetooth, and networking
- Update GEMINI.md with the new Modular Merging Architecture blueprint
- Configure graphical installer ISO and test VM outputs

modules/home/alacritty.nix

@@ -0,0 +1,33 @@
+{ config, pkgs, ... }:
+
+{
+  programs.alacritty = {
+    enable = true;
+    settings = {
+      general.import = [ "~/.config/nomarchy/current/theme/alacritty.toml" ];
+      env = {
+        TERM = "xterm-256color";
+      };
+      terminal = {
+        osc52 = "CopyPaste";
+      };
+      font = {
+        normal = { family = config.nomarchy.fonts.monospace; style = "Regular"; };
+        bold = { family = config.nomarchy.fonts.monospace; style = "Bold"; };
+        italic = { family = config.nomarchy.fonts.monospace; style = "Italic"; };
+        size = 9;
+      };
+      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"; }
+        ];
+      };
+    };
+  };
+}