modules: move options to the top

This greatly improves readability and makes it easier to discover options.

This commit was genereated by running the following script inside the
repo root dir:

#!/usr/bin/env ruby

def transform(src)
  return false if src.include?('inherit options;')

  success = false

  options = nil
  src.sub!(/^  options.*?^  }.*?;/m) do |match|
    options = match
    "  inherit options;"
  end
  return false if !options

  src.sub!(/^with lib;\s*let\n+/m) do |match|
    success = true
    <<~EOF
      with lib;
      let
      #{options}

    EOF
  end

  success
end

Dir['modules/**/*.nix'].each do |f|
  src = File.read(f)
  if transform(src)
    puts "Changed file #{f}"
    File.write(f, src)
  end
end

modules/lnd-rest-onion-service.nix

@@ -1,24 +1,7 @@
 { config, lib, pkgs, ... }:
 
 with lib;
-
 let
-  cfg = config.services.lnd.restOnionService;
-  nbLib = config.nix-bitcoin.lib;
-  runAsUser = config.nix-bitcoin.runAsUserCmd;
-
-  lnd = config.services.lnd;
-
-  bin = pkgs.writeScriptBin "lndconnect-rest-onion" ''
-    #!/usr/bin/env -S ${runAsUser} ${lnd.user} ${pkgs.bash}/bin/bash
-
-    exec ${cfg.package}/bin/lndconnect \
-     --host=$(cat ${config.nix-bitcoin.onionAddresses.dataDir}/lnd/lnd-rest) \
-     --port=${toString lnd.restPort} \
-     --lnddir=${lnd.dataDir} \
-     --tlscertpath=${lnd.certPath} "$@"
-  '';
-in {
   options.services.lnd.restOnionService = {
     enable = mkOption {
       default = false;
@@ -36,6 +19,24 @@ in {
     };
   };
 
+  cfg = config.services.lnd.restOnionService;
+  nbLib = config.nix-bitcoin.lib;
+  runAsUser = config.nix-bitcoin.runAsUserCmd;
+
+  lnd = config.services.lnd;
+
+  bin = pkgs.writeScriptBin "lndconnect-rest-onion" ''
+    #!/usr/bin/env -S ${runAsUser} ${lnd.user} ${pkgs.bash}/bin/bash
+
+    exec ${cfg.package}/bin/lndconnect \
+     --host=$(cat ${config.nix-bitcoin.onionAddresses.dataDir}/lnd/lnd-rest) \
+     --port=${toString lnd.restPort} \
+     --lnddir=${lnd.dataDir} \
+     --tlscertpath=${lnd.certPath} "$@"
+  '';
+in {
+  inherit options;
+
   config = mkIf cfg.enable {
     services.tor = {
       enable = true;