feat(rust/catalyst-types): Add the 'rc' serde feature to catalyst-types in order to be able to serialize ProblemReport

[stanislav-tkach]

Description

• Added rc to the list of serde features for the catalyst-types crate.
• Added a test for ProblemReport serialization.

Description of Changes

Serde provides Serialize/Deserialize implementations for Rc<T> and Arc<T> but it is hidden under the rc feature.

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module

[github-actions]

✅ Test Report | ${\color{lightgreen}Pass: 272/272}$ | ${\color{red}Fail: 0/272}$ |

[stanislav-tkach]

Alternatively I can manually add the Serialize implementation. This is a less invasive, but more verbose approach.

[bkioshn]

LGTM