feat: Add APIs to create custom views on the dashboard (#2498)

spec/factories/custom_filters.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :custom_filter do
+    sequence(:name) { |n| "Custom Filter #{n}" }
+    filter_type { 0 }
+    query { { labels: ['customer-support'], status: 'open' } }
+    user
+    account
+  end
+end