Added Rules controller show() method to list and link all rules and target host configurations.
Added Rule Controller method for store() method and tested that new rules are successfully validated and created via. the API.
Added Rule Controller method for destroy() and tested that new rules are successfully deleted via. the API.
Added Rule Controller method for show() and tested that a specific rule and all targets for that rule can be successfully requested via. the API.
Rule API controller is now complete, Implemented the last method required which was the update() method, tested that renaming a rule's origin address was working as expected and the validation does intercept issues.
Changes invalid API request response to 403 instead of 404 as this better reflects the fact that the request is not permitted as opposed to a resource not being found on the server.