This will be useful to decouple ComponentPartial and Asset objects from their Halcyon counterparts
An Asset is technically not a template, it may be hosted via a CDN or others
A ComponentPartial is also different, it is read only and doesn't require caching
When October would load a file from its changed source, Twig would not see the message until it had gone. See Cms\Classes\Loader->isFresh. This meant a template would not update unless you deleted the Twig cache, or that template's TTL expired. Fix: add another variable (freshness) that would only change after being observed, and accurately reflected if a template's source had been modified
