Improving Usability by Implementing serde traits

[simnalamburt]

As documented in the Rust API Guidelines, implementing the Serialize and Deserialize traits from the Serde crate is crucial for circ’s interoperability. I suggest that circ also implement Serialize and Deserialize, similar to how Serde implements these traits for std::rc::Rc, std::rc::Weak, std::sync::Arc, and std::sync::Weak. And let’s create a feature gate named "rc", and include it in the default features so that Serde support is enabled by default, while allowing for an opt-out option (just like how Serde has done it).

As with last time, I can slowly work on this implementation myself when I have time, but I’m also okay if the maintainers decide to implement it first.

References

• https://docs.rs/serde/latest/serde/trait.Serialize.html#impl-Serialize-for-Rc%3CT%3E
• https://docs.rs/serde/latest/serde/trait.Serialize.html#impl-Serialize-for-Weak%3CT%3E
• https://docs.rs/serde/latest/serde/trait.Serialize.html#impl-Serialize-for-Arc%3CT%3E
• https://docs.rs/serde/latest/serde/trait.Serialize.html#impl-Serialize-for-Weak%3CT%3E-1
• https://docs.rs/serde/latest/serde/trait.Deserialize.html#impl-Deserialize%3C'de%3E-for-Rc%3CT%3E
• https://docs.rs/serde/latest/serde/trait.Deserialize.html#impl-Deserialize%3C'de%3E-for-Weak%3CT%3E
• https://docs.rs/serde/latest/serde/trait.Deserialize.html#impl-Deserialize%3C'de%3E-for-Arc%3CT%3E
• https://docs.rs/serde/latest/serde/trait.Deserialize.html#impl-Deserialize%3C'de%3E-for-Weak%3CT%3E-1