refactor(policy): use most-specific-pattern-wins evaluation model

[laststylebender14]

fixes: #3085

[amitksingh1490]

what is Simple?

need some changes

[amitksingh1490]

this test will fail

#[test]
fn test_policy_engine_composite_specificity_ignores_non_matching_child() {
    let fixture_workflow = PolicyConfig::new()
        .add_policy(Policy::Any {
            any: vec![
                Policy::Simple {
                    permission: Permission::Allow,
                    rule: Rule::Write(WriteRule { write: "*.rs".to_string(), dir: None }),
                },
                Policy::Simple {
                    permission: Permission::Allow,
                    rule: Rule::Write(WriteRule {
                        write: "very/specific/path/that/does/not/match/*.rs".to_string(),
                        dir: None,
                    }),
                },
            ],
        })
        .add_policy(Policy::Simple {
            permission: Permission::Deny,
            rule: Rule::Write(WriteRule { write: "test.rs".to_string(), dir: None }),
        });
    let fixture = PolicyEngine::new(&fixture_workflow);
    let operation = PermissionOperation::Write {
        path: std::path::PathBuf::from("test.rs"),
        cwd: std::path::PathBuf::from("/test/cwd"),
        message: "Create/overwrite file: test.rs".to_string(),
    };

    let actual = fixture.can_perform(&operation);
    let expected = Permission::Deny;

    assert_eq!(actual, expected);
}