[Feature] (Bonsai SDK) Missing trait instances for SessionId

[intoverflow]

Feature

Add trait instances for Eq, Deserialize, and Serialize to SessionId.

Motivation

The missing Eq trait seems like an oversight. The type already implements PartialEq, and semantically it makes sense for ID types to support equality checking.

The missing Deserialize and Serialize traits also seem like an oversight. For end users, SessionId is the sort of thing they might want to persist to disk or database. Right now the only way to do this is to serialize the session's uuid field, then deserialize with the help of SessionId::new(). This works, but it's somewhat abstraction-breaking, and it's not clear that there's a downside to providing the Serde traits.

Implementation

Add the traits to the #[derive(..)] directive.