Populate and document meaningful Clippy strict and relaxed profiles

### What

The score_rust_policies repository already contains placeholder Clippy profiles under clippy/strict and clippy/relaxed.

The goal of this task is to define a curated and documented set of Clippy lints and configuration options for both profiles, providing consistent linting guidance for Rust projects within S-CORE.

The profiles should be based on evaluation of current Rust community best practices, including recommendations from:

https://emschwartz.me/your-clippy-config-should-be-stricter/
https://billylevin.dev/posts/clippy-config/

Special attention should be given to lints relevant for quality- and safety-oriented software development, such as panic handling, unsafe code usage, error handling, and correctness-related checks.

### Acceptance Criteria (DoD)

- The strict profile contains a documented set of enabled Clippy lints and configuration settings.
- The relaxed profile contains a documented set of enabled Clippy lints and configuration settings.
- The rationale for enabling or disabling notable lint groups is documented.
- The differences between the strict and relaxed profiles are documented.
- The proposed profiles have been validated against at least one existing S-CORE Rust repository.

### How

- Evaluate Clippy lint groups such as pedantic, nursery and selected restriction lints.
- Review recommendations from the referenced articles and assess their applicability to S-CORE.
- Identify lints that should be:
- enabled in both profiles,
- enabled only in the strict profile,
- explicitly disabled.