Add basic UI for Taxjar settings in solidus admin

This commit adds a tab to the taxes section of the solidus admin
settings. This provides the foundation for further configuration of
taxjar through the solidus admin.

The settings should be hidden if an API key has not been provided.
This is to conform to the certification guidelines for an official
Taxjar extension.

Co-authored-by: Nick Van Doorn <nick@super.gd>

1 files changed, 7 insertions, 0 deletions

diff --git a/config/routes.rb b/config/routes.rb
new file mode 100644
index 0000000..36ac61d
--- /dev/null
+++ b/config/routes.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+Spree::Core::Engine.routes.draw do
+  namespace :admin do
+    resource :taxjar_settings, only: [:show]
+  end
+end