@reatom/persist-web-storage garbage collection and asynchronous persistence initialization

[osovv]

We want to:

1. Collect obsolete persistence as soon as possible, which is currently impossible because accessing a persisted record can only be done with the relative atom.
2. Initialize asynchronous storage (IndexedDB) at application startup.

Main idea:

Persisted Atoms Registry

• It would be nice to have a separate registry with metadata about persisted atoms, so that we can manage them based on their lifetime (delete if it has expired).
• This would be an atom with a PersistRecord array that would also be persisted.
• We will have some init method (or maybe just on app init) that does the following:
  • Loads the registry into memory from the persistence layer
  • Checks all the entries in the registry:
    • if the entry has expired - it should be deleted (gargabe collector).
    • if the entry has not expired - it should be loaded into the memory cache.
  • We can store the loaded status for each individual persisted atom, or maybe for the whole registry, this is negotiable.

As a result, we can do something like this when initializing the application.

await withIndexedDb.init(ctx)
// or
await withAsyncLocalStorage.init(ctx)

This way, persisted atoms are guaranteed to be initialized during rendering.