README: Add NIP-05 and NIP-44 to the Supported NIPs List

[cameri]

The README lists supported NIPs, but is missing NIP-05 (Nostr Identity Verification) and NIP-44 (Encrypted Direct Messages), both of which are now implemented in the codebase:

• NIP-05: Identity verification is implemented in src/utils/nip05.ts and throughout the codebase (database, event handlers, maintenance-worker, etc).
• NIP-44: Encrypted direct messages and payload format validation are in src/utils/nip44.ts and used for gift wrap events (kind 1059).

Please update the README's Features section to add these NIPs. This will help users and contributors be aware of all protocol features currently supported.

[Mahmoud-s-Khedr]

Can I work on this

[cameri]

this was completed by @radosvet93 , thanks!