feat: Add CSAT response APIs (#2503)

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

app/helpers/date_range_helper.rb

@@ -0,0 +1,19 @@
+##############################################
+# Helpers to implement date range filtering to APIs
+# Include in your controller or service class where params is available
+##############################################
+
+module DateRangeHelper
+  def range
+    return if params[:since].blank? || params[:until].blank?
+
+    parse_date_time(params[:since])..parse_date_time(params[:until])
+  end
+
+  def parse_date_time(datetime)
+    return datetime if datetime.is_a?(DateTime)
+    return datetime.to_datetime if datetime.is_a?(Time) || datetime.is_a?(Date)
+
+    DateTime.strptime(datetime, '%s')
+  end
+end