Add resource definitions for all 22 API tags, wire client accessors and require tree

lib/fiken/resources/accounts.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module Fiken
+  module Resources
+    # /companies/{slug}/accounts — find by account code (e.g. "1500:10001").
+    class Accounts < Resource::Base
+      include Resource::Listable
+      include Resource::Findable
+
+      def resource_path
+        "accounts"
+      end
+    end
+
+    # /companies/{slug}/accountBalances
+    class AccountBalances < Resource::Base
+      include Resource::Listable
+      include Resource::Findable
+
+      def resource_path
+        "accountBalances"
+      end
+    end
+  end
+end