[nip66] maintenance on nip66/adapters

[dskvr]

• remove non-functional adapters
• Eliminate deprecated Workers class dependency (only one method is being used since change lifecycle management, the entire class can be deleted once the dependency on that method can be removed)
• Eliminate callback hell between service <-> adapter that was inadvertently ushered into existence while identifying best caching strategy.
• eliminate head-spin between Adapter <-> ${Type}Adapter child classes.
• Clarify CacheAdapter interface
• Clarify WebsocketAdapter interface
• DRY up Monitor service (wet af)
• Update existing tests
• Write tests for all core classes.
• Write tests for all utils
• Write tests for NostrTools and NostrSqlite (worker-relay) adapters.

discoveries

• explore converting subscritbe and fetch in Services base class to a generator.
• explore extending that generator from gui to yield/inject events store