feat: v1.0.0

[marsavar]

[1.0.0] - 2025-07-02

Changed

• [BREAKING CHANGE] GuardianContentClient no longer needs to be mutable. To account for this change, requests must be built with the .build_request() method to be called on the client. An example can be found in the README.md file.
  The motivation for this change is to be able to share the client between multiple threads without resorting to synchronisation primitives.
• The client no longer prints to stderr if the Guardian Content API responds with an error. The client now returns an Error variant depending on the type of error, so that downstream consumers can deal with the errors as they wish.
• Removed the aletheia::Result<T> type.
• Upgraded several dependencies.

Added

• Added MSRV to the project

Fixed

• The pages field in the SearchResponse struct is now of type Option<isize> (previously Option<u32>) to account for the API responding with -1 when setting the page size to 0 on the client.