Function get_implementing_args 

pub fn get_implementing_args<'a>(
    func_name: &str,
    args: &'a [Box<dyn Any>],
) -> Vec<(TypeId, &'a dyn ArrayProtocol)>

Helper function to extract all arguments implementing the ArrayProtocol trait that also claim (via ArrayProtocol::supports_op) to support the named operation.

This is similar to NumPy’s _get_implementing_args function. Optimized version with pre-allocated capacity and fast-path for common cases.

func_name should be the same operation name later passed to array_function/ArrayFunction::new at the call site (e.g. "scirs2::array_protocol::operations::subtract"). Filtering on it here means an argument whose concrete type doesn’t implement this specific operation is excluded from the candidate list, so callers correctly fall through to a different implementation (or a plain-ndarray fallback) instead of delegating to a candidate that’s guaranteed to return NotImplemented for this particular func_name.