There is a generic trigger that supports filters. But I don’t think thats warranted in this case. A Group or tag would be a better choice, particularly on lower power machines.
No. GenericEventTrigger. I’ve used this in my Thing Status Reporting [4.0.0.0;4.9.9.9] rule template to trigger the rule on all changes to a Thing’s status. It’s not available in Rules DSL and it requires hand coding it in the UI from the Code tab. But that’s OK, most users day-to-day shouldn’t be using this trigger anyway.
You can add tags to rules and use the search bar to find all the rules with a given tag. You can also use the Developer Sidebar to pin what you are currently working on.
The list can get long on any OH Settings page which is why there is a fairly robust search capability.
The nice thing about the developer sidebar is you can pin everything: Items, Things, Rules, etc. so everything is right there.
The code fences buttons of the forum software have not been updated since before OH 3. At that time there was no YAML in OH anywhere. The buttons use the languages closest to the custom formats OH defines for those entities. In the rules case, PHP gave the best results for Rules DSL.