This commit removes rust-nostr dependency, and replaces the NIP-44 logic
with a new NIP-44 module based on the Swift NostrSDK implementation.
The decision to move away from rust-nostr and the Swift NostrSDK was
made for the following reasons:
1. `rust-nostr` caused the app size to double
2. We only need NIP44 functionality, and we don't need to bring
everything else
3. The Swift NostrSDK caused conflicts around the secp256k1 dependency
that is hard to address
4. The way we do things in the codebase is far different from the Swift
NostrSDK, and we optimize it for use with NostrDB. Bringing it an
outside library causes significant complexity in integration with
NostrDB, and would effectively cause the codebase to be split into
two different ways of achieving the same results. Therefore it is
cleaner if we stick to our own Nostr structures and functions and
focus on maintaining them.
However, the library CryptoSwift was added as a dependency, to bring in
ChaCha20 which is not supported by CryptoKit (CryptoKit supports the
ChaCha20-Poly1305 cipher, but NIP-44 uses ChaCha20 with HMAC-SHA256
instead)
Closes: https://github.com/damus-io/damus/issues/2849
Changelog-Changed: Made internal changes to reduce the app binary size
Signed-off-by: Daniel D’Aquino <daniel@daquino.me>