v0.1.0 of nip_append_only_list

Local-first Dart implementation of the Nostr append-only lists NIP (kinds 1990/1991) on top of NDK. Changelog excerpt: Initial release. - Pure OR-Set CRDT core: AppendOnlyListEntry, EntryStat, AppendOnlyListEvent, AppendOnlyListState(parse and fold kinds 1990/1991). - Event builder/parser with NIP-44 self-encryption for private entries. - Filterhelpers (listFilter, deletionFilter) for relay queries. - Sembast-backed cleartext ProjectionStorefor offline reads that survive restarts. - AppendOnlyListsusecase wiring an injected Ndk, OfflineBroadcastqueue, and ProjectionStore: getList, `wat[...]