Add a11ywatch and related configurations for Podman and Nginx

- Introduced a new module for a11ywatch with Podman support, creating a bridge network and defining backend and frontend containers.
- Configured Nginx to serve the a11ywatch application with SSL and ACME support.
- Added user and group configurations for a11ywatch.
- Created a systemd service to ensure the Podman network exists on boot.

Implement Firefox Container Controller extension and host

- Added a module for the Firefox Container Controller extension, allowing installation via Nix.
- Created a native messaging host for the extension to communicate with the container controller.
- Included CLI helpers to enqueue commands for showing and hiding containers.

Enable fingerprint authentication in PAM

- Configured fingerprint authentication for login, sudo, and swaylock services.

Setup Raspberry Pi OS image creation script

- Developed a script to create a read-only Raspberry Pi OS Lite image with Snapcast client.
- Included configuration for Wi-Fi, hostname, and Snapcast server.
- Implemented user and group setup for Snapcast client and ensured necessary services are enabled.

Document Raspberry Pi Zero W setup instructions

- Added detailed instructions for configuring Raspberry Pi OS on Zero W, including disabling unused services and setting up Snapcast client.

Create test configuration script for NixOS

- Implemented a script to perform dry-builds for NixOS configurations, allowing for easy validation of host configurations.

hosts/nb/modules/desktop/firefox-container-controller-host.nix

@@ -0,0 +1,59 @@
+{ pkgs, lib, ... }:
+
+let
+  # 1) Native‐messaging host: reads and clears the queued JSON command
+  containerControllerHost = pkgs.writeScriptBin "firefox-containercontroller-host" ''
+    #!/usr/bin/env bash
+    CMD_FILE="$HOME/.cache/firefox-container-command.json"
+    if [ -f "$CMD_FILE" ]; then
+      cat "$CMD_FILE"
+      rm "$CMD_FILE"
+    else
+      echo '{}'
+    fi
+  '';
+
+  # 2) CLI helper to enqueue a “hide” command
+  hideContainer = pkgs.writeScriptBin "hide-container" ''
+    #!/usr/bin/env bash
+    if [ -z "$1" ]; then
+      echo "Usage: $0 <userContextId>" >&2
+      exit 1
+    fi
+    ID="$1"
+    mkdir -p "$HOME/.cache"
+    printf '{"userContextId": %s, "action": "hide"}' "$ID" \
+      > "$HOME/.cache/firefox-container-command.json"
+  '';
+
+  # 3) CLI helper to enqueue a “show” command
+  showContainer = pkgs.writeScriptBin "show-container" ''
+    #!/usr/bin/env bash
+    if [ -z "$1" ]; then
+      echo "Usage: $0 <userContextId>" >&2
+      exit 1
+    fi
+    ID="$1"
+    mkdir -p "$HOME/.cache"
+    printf '{"userContextId": %s, "action": "show"}' "$ID" \
+      > "$HOME/.cache/firefox-container-command.json"
+  '';
+in
+{
+  # Install host + helpers
+  environment.systemPackages = [
+    containerControllerHost
+    hideContainer
+    showContainer
+  ];
+
+  # Register the native‐messaging host for our extension
+  environment.etc."mozilla/native-messaging-hosts/com.firefox.containercontroller.json".text =
+    builtins.toJSON {
+      name               = "com.firefox.containercontroller";
+      description        = "Native messaging host for Container Controller";
+      path               = containerControllerHost;
+      type               = "stdio";
+      allowed_extensions = [ "containercontroller@cloonar.com" ];
+    };
+}