Modular crypto service

[joyqvq]

[joyqvq]

On a high level the tasks falls under:

1. User Keystore

• [x] Remove signer from AccountKeyStore https://github.com/MystenLabs/sui/pull/4828
• [x] Use Keystore enum_dispatch instead of a boxed dynamic trait https://github.com/MystenLabs/sui/pull/4909
• [x] Always invoke signing with Signature::new (there are few places we use try_sign, and this can be missed during migration) https://github.com/MystenLabs/sui/pull/5033
• [x] Add intent signing under Signature::new_secure https://github.com/MystenLabs/sui/pull/3687
• [ ] Switch Typescript sdk to Signature::new_secure
• [ ] Switch Rust sdk to Signature::new_secure
• [ ] Expose get_chain_id endpoint in API (wallet can store this and use when it signs)
• [ ] Migrate sui-sdk crypto.rs and sui-types crypto.rs key related handling to a new crate sui-keys
• [ ] Snapshot test for Sui client config https://github.com/MystenLabs/sui/issues/4977
• [ ] Stretch goal: use AccountKeystore trait with Ledger's rust-sdk

2. Validator Keystore

• [ ] Switch AuthoritySignature AuthoritySignature::new_secure
• [ ] TODO

cc @kchalkias @patrickkuo for some upcoming PR review contexts