Show UI warning to user when they need provider data but have not setup Synth yet (#1926)

* Simplify provider concerns

* Update tests

* Add UI warning for missing Synth key if family requires external data

app/models/concerns/synthable.rb

@@ -0,0 +1,37 @@
+module Synthable
+  extend ActiveSupport::Concern
+
+  class_methods do
+    def synth_usage
+      synth_client&.usage
+    end
+
+    def synth_overage?
+      synth_usage&.usage&.utilization.to_i >= 100
+    end
+
+    def synth_healthy?
+      synth_client&.healthy?
+    end
+
+    def synth_client
+      api_key = ENV.fetch("SYNTH_API_KEY", Setting.synth_api_key)
+
+      return nil unless api_key.present?
+
+      Provider::Synth.new(api_key)
+    end
+  end
+
+  def synth_client
+    self.class.synth_client
+  end
+
+  def synth_usage
+    self.class.synth_usage
+  end
+
+  def synth_overage?
+    self.class.synth_overage?
+  end
+end