Find more lightweight libraries to replace libsodium.js

[webmaster128]

libsodium.js is amazing but big. This could be mitigated by using our own build. However, I assume the better path is to break it down into the algorithms we need and have them in separate modules. This allows optimizers to better remove unused code. Also only Argon2 needs Wasm speed.

Replacements for the following algos are needed

• [ ] Argon2 (see https://github.com/cosmos/cosmjs/pull/907; looks surprisingly good now with the latest Rust compiler)
• [ ] Ed25519 (use different implementation, see https://github.com/cosmos/cosmjs/issues/584)
• [ ] xchacha20poly1305_ietf

[o-az]

Ed25519 -> https://github.com/paulmillr/noble-ed25519 Argon2id -> https://github.com/paulmillr/noble-hashes#argon2