chore: Add internal feature flags for Chatwoot Cloud (#10902)

This PR introduces internal feature flags for testing purposes. These
flags will not be displayed on regular instances to prevent customer
confusion.

Additionally, a new feature flag, `contact_chatwoot_support_team`, has
been added for Chatwoot Cloud. This flag disables contact support for
third-party onboarded accounts, as support will be handled by the
original affiliate team.

Co-authored-by: Pranav <pranav@chatwoot.com>

app/helpers/super_admin/account_features_helper.rb

@@ -6,4 +6,14 @@ module SuperAdmin::AccountFeaturesHelper
   def self.account_premium_features
     account_features.filter { |feature| feature['premium'] }.pluck('name')
   end
+
+  # Accepts account.features as argument
+  def self.filtered_features(features)
+    deployment_env = GlobalConfig.get_value('DEPLOYMENT_ENV')
+    return features if deployment_env == 'cloud'
+
+    # Filter out internal features for non-cloud environments
+    internal_features = account_features.select { |f| f['chatwoot_internal'] }.pluck('name')
+    features.except(*internal_features)
+  end
 end