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/samba.nix

@@ -0,0 +1,66 @@
+{ lib, pkgs, config, ... }:
+{
+  environment.systemPackages = with pkgs; [
+  ];
+
+  # TODO: smbpasswd -a <USER>
+
+  services.samba-wsdd = {
+    # make shares visible for Windows clients
+    enable = true;
+    openFirewall = true;
+  };
+
+  services.samba = {
+    enable = true;
+    package = pkgs.sambaFull;
+    openFirewall = true;
+    securityType = "user";
+    extraConfig = ''
+      # Files
+      workgroup = WORKGROUP
+      server string = Jeeves
+      netbios name = jeeves
+      security = user
+      #use sendfile = yes
+      #max protocol = smb2
+      # NOTE: localhost is the ipv6 localhost ::1
+      hosts allow = 192.168.0. 192.168.1. 10.100.0. 127.0.0.1 localhost
+      hosts deny = 0.0.0.0/0
+      guest account = nobody
+      map to guest = bad user
+
+      # Symlinks
+      allow insecure wide links = yes
+
+      # Printers
+      load printers = yes
+      printing = cups
+      printcap name = cups
+    '';
+    shares = {
+      public = {
+        path = "/data/samba/public";
+        browseable = "yes";
+        "read only" = "no";
+        "guest ok" = "yes";
+        "create mask" = "0644";
+        "directory mask" = "0755";
+        "force user" = "jeeves";
+        "force group" = "users";
+      };
+      private = {
+        path = "/data/samba/private";
+        browseable = "yes";
+        "read only" = "no";
+        "guest ok" = "no";
+        "create mask" = "0644";
+        "directory mask" = "0755";
+        "force user" = "jeeves";
+        "force group" = "users";
+        "follow symlinks" = "yes";
+        "wide links" = "yes";
+      };
+    };
+  };
+}