Use Stripe payment link id for contribution URL

Agent-Logs-Url: https://github.com/we-promise/sure/sessions/efba0c75-5f82-41a1-b618-532d38e222da

Co-authored-by: jjmata <187772+jjmata@users.noreply.github.com>

app/controllers/settings/payments_controller.rb

@@ -5,5 +5,11 @@ class Settings::PaymentsController < ApplicationController
 
   def show
     @family = Current.family
+    @one_time_contribution_url = stripe&.payment_link_url
   end
+
+  private
+    def stripe
+      @stripe ||= Provider::Registry.get_provider(:stripe)
+    end
 end