NIP44 - Encrypted payloads

[KKA11010]

Is your feature request related to a problem? Please describe.
Current implementation: NIP04 (Deprecated in favor of NIP44)
https://github.com/nostr-protocol/nips/blob/master/04.md

Describe the solution you'd like
NIP44: https://github.com/nostr-protocol/nips/blob/master/44.md

Independant audit of NIP44 covered by the openSats grant: https://cure53.de/audit-report_nip44-implementations.pdf

Additional context
NIP44 provides a detailed analysis of the shortcomings in the existing NIP04 implementation. It highlights the need for secure communication between Nostr accounts and suggests measures to mitigate vulnerabilities. The proposal encourages the community to enhance the security of the Nostr messaging system.
It also recommends using specialized E2EE messaging software for risky situations.