Make this work for Right To Know instead of PlanningAlerts

[equivalentideas]

• [x] decide what we want to be informed of
• [x] get the data
• [x] change the lookup methods
• [x] update the readme

[equivalentideas]

Done in https://github.com/openaustralia/jacaranda-righttoknow/compare/7333e6a9b174...9f22cda69f6c