enable fn_params_excessive_bools clippy rule

[anonrig]

Ref: #6360 (comment)

This rule forces every bool argument to be converted into enum. We might want to enable this, or not...

[ask-bonk]

The PR is clean. Let me verify: the changes enable the fn_params_excessive_bools clippy lint, set max-fn-params-bools = 0 (meaning no bool parameters allowed at all), and properly suppress the lint with #[expect(...)] and clear reason strings at the three locations where bool parameters are dictated by the C++ FFI interface. The exploration confirmed there are no other functions in the Rust codebase (outside tests) that take bare bool parameters, so no other locations need suppression.

The #[expect] is correctly used instead of #[allow] (per project convention), the reason strings are clear and accurate, and the module-level suppression on pub mod ffi is appropriate since the CXX bridge functions have signatures dictated by the C++ side.

No actionable issues found.

LGTM

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