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/jellyfin.nix

@@ -0,0 +1,49 @@
+{ lib, pkgs, config, ... }:
+{
+  hardware.graphics = {
+    enable = true;
+    enable32Bit = true;
+    extraPackages = with pkgs; [
+      vaapiVdpau
+      libva1
+      vulkan-loader
+      vulkan-validation-layers
+      vulkan-extension-layer
+    ];
+  };
+
+  services = {
+    nginx = {
+      virtualHosts."jellyfin.jeeves.local" = {
+        enableACME = false;
+        forceSSL = false;
+        locations."/".proxyPass = "http://127.0.0.1:8096";
+      };
+    };
+
+    jellyfin = {
+      enable = true;
+      openFirewall = true;
+    };
+    # sonarr = {
+    #   enable = true;
+    #   openFirewall = true;
+    # };
+    # radarr = {
+    #   enable = true;
+    #   openFirewall = true;
+    # };
+    # bazarr = {
+    #   enable = true;
+    #   openFirewall = true;
+    # };
+    # readarr = {
+    #   enable = true;
+    #   openFirewall = true;
+    # };
+    # prowlarr = {
+    #   enable = true;
+    #   openFirewall = true;
+    # };
+  };
+}