Add a new rule to prevent chaining get queries

As stated in the [cypress documentation](https://docs.cypress.io/api/commands/get#Get-vs-Find), `cy.get()` searches from the root element, thus it seems that there is no point in chaining two `cy.get()` (like `cy.get().get()`) and most of the time, what is really wanted is to do `cy.get().find()`. 

I am willing to give this rule a try if you think this is relevant!