Get the schema `hash_fn` and `eq_fn` for the `Quat` type.

[github-actions[bot]]

Quats don't implement hash and eq by default because of floating point number issues, so we'll have to use a workaround like `CustomRawFns` below to create valid implementations of Hash and Eq over the floating points inside the Quat.

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https://github.com/fishfolk/bones/blob/db6560fbcc29b791e7cb2149bbd85c0497d03430/framework_crates/bones_schema/src/std_impls.rs#L131-L138

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This issue was generated by todo-issue based on a TODO comment in db6560fbcc29b791e7cb2149bbd85c0497d03430.