clippy: integrated clippy using rules_lint

[saksham-chawla]

incorporated in the .bazelrc
added new workflow

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Integrate Clippy for Rust Code Quality and Fix FFI Mutability

This pull request integrates Clippy, a Rust linter, into the project's Bazel build system and CI/CD pipeline. It introduces a new GitHub Actions workflow for automated Clippy checks on pull requests and pushes to main. The .bazelrc is updated to enable Clippy by default for Rust targets and provides a strict lint configuration. Additionally, a minor fix related to mutable FFI pointer handling in runtime.rs was applied, likely identified or prompted by linting considerations, and the README.md was updated to document the new Clippy setup.

Architecture Diagram:

flowchart TD
    subgraph CI_CD_Layer
        A["GitHub Workflow (.github/workflows/clippy.yml +28)"] -- triggers --> B["Bazel Clippy Job"]
    end

    subgraph Build_System_Layer
        B -- uses config --> C[".bazelrc (+5)"]
        C -- configures --> D["aspect_rules_lint (v2.0.0)"]
        C -- uses policies from --> E["score_rust_policies (new dep)"]
        D -- applies linting to --> F["Rust Runtime Code (runtime.rs +3/-10)"]
    end

    subgraph Documentation_Layer
        H["README.md (+8/-1)"] -- documents --> C
        H -- documents --> F
    end

    D -- depends on --> E

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