Push reactive changesets into PersistedCollection

[jamesgibson14]

Currently onChange just triggers a this.persistenceAdapter.load(). Could we pass a changeSet to onChange -> loadPersistentData so that it could just load the partial changes instead of doing a full load/pull? Something like:

async register(onChange) {
      websock.onMessage({items, changes} => {
        void onChange({items, changes})
      }
    },

if loadPersistentData receives a changeSet then it just uses that instead of calling load

[maxnowack]

I think it's a good idea. This makes the development of new persistence adapters more straight forward 🙂