feat: create BulkUploadMailer class

app/mailers/bulk_upload_mailer.rb

@@ -0,0 +1,20 @@
+class BulkUploadMailer < NotifyMailer
+  BULK_UPLOAD_FAILED_TEMPLATE_ID = "e27abcd4-5295-48c2-b127-e9ee4b781b75".freeze
+  BULK_UPLOAD_WITH_ERRORS_TEMPLATE_ID = "e27abcd4-5295-48c2-b127-e9ee4b781b75".freeze
+
+  def send_bulk_upload_failed_mail(user, bulk_upload)
+    send_email(
+      user.email,
+      BULK_UPLOAD_FAILED_TEMPLATE_ID,
+      { filename: "1", upload_timestamp: "2", year_combo: "3", lettings_or_sales: "4", error_description: "5", summary_report_link: "6" },
+    )
+  end
+
+  def send_bulk_upload_with_errors_mail(user, bulk_upload)
+    send_email(
+      user.email,
+      BULK_UPLOAD_WITH_ERRORS_TEMPLATE_ID,
+      { title: "1", filename: "2", upload_timestamp: "3", error_description: "4", summary_report_link: "5" },
+    )
+  end
+end