feat: Add APIs for Dialogflow integration V1 (#2155)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

db/migrate/20210425093724_convert_integration_hook_settings_field.rb

@@ -0,0 +1,6 @@
+class ConvertIntegrationHookSettingsField < ActiveRecord::Migration[6.0]
+  def change
+    remove_column :integrations_hooks, :settings, :text
+    add_column :integrations_hooks, :settings, :jsonb, default: {}
+  end
+end