feat(configurations)!: flatten down, introduce meta.nix

Flatten down directory structure:
- From: `./hosts/${configuration-type}/${system}/{configuration,deploy}.nix`
-   To: `./hosts/${configuration-type}/{meta,configuration}.nix`
Keep `system` and `deploy-rs` config in `meta.nix`
Update `flake.lock`

hosts/nixos/jeeves/home-assistant/default.nix

@@ -0,0 +1,39 @@
+{ inputs, lib, pkgs, config, ... }:
+{
+  environment.systemPackages = with pkgs; [
+  ];
+
+  nixpkgs.config.permittedInsecurePackages = [
+    "openssl-1.1.1w"
+  ];
+
+  services.home-assistant = {
+    enable = true;
+    extraComponents = [
+      # Components required to complete the onboarding
+      "esphome"
+      "met"
+      "radio_browser"
+      "tuya"
+    ];
+    config = {
+      # Includes dependencies for a basic setup
+      # https://www.home-assistant.io/integrations/default_config/
+      default_config = { };
+      mobile_app = { };
+      map = { };
+    };
+  };
+
+  networking.firewall =
+    lib.pipe
+      [ "TCP" "UDP" ]
+      [
+        (builtins.map
+          (protocol:
+            lib.nameValuePair
+              "allowed${protocol}Ports"
+              [ 8123 ]))
+        builtins.listToAttrs
+      ];
+}