feat: Ongoing campaign complex rules

@muhsin-k commented on [Sat Aug 14 2021]( What is an ongoing campaign ? The ability for customer send outbound messages to their contacts which would trigger more conversations. It is essentially a welcome message configured to pop up based on various conditions. Now are primarily focusing on triggering messages on simple page rules ( visitor visits page x / visitor spends x time of page x ). Now it supports on website live chat only ![campaign]( [_ Problem Statement Currently, the campaigns are working based on absolute URLs and the time they are spending on the website. But most real-world use cases consist of dynamic URLs. For an example of an E-commerce website, the product ID for each product gives a different URL for the same page: At the moment it is not possible to run a campaign in a particular product since the ongoing campaign support 2 rules only • The matching page URL • Time on page Related issues we are going to solve,…