Fix support for enum/bool auxiliary signals in NX Line visualization

[axelboc]

assertNumericLikeNxData was asserting for NxData<NumericType> instead of NxData<NumericLikeType> ... but was correctly calling assertNumericLikeType internally! So MappedLineVis thought it could only receive numeric (nd)arrays (number[] | TypedArray) when in fact, at runtime, it could receive boolean[].

No errors were thrown at runtime because JS automatically coerces booleans to numbers in all mathematical operations (e.g. Math.min(false, 2) => 0). This typing bug would have been more problematic with bigint[], though.

I say "Fix support", because the fix still has invisible runtime implications: I now convert boolean auxiliary arrays to number arrays in MappedLineVis with a new hook called useToNumArrays, which avoids type coercion further down the line (e.g. in useDomains).

[loichuder]

I wonder if it might not be clearer to introduce a new type alias here to not reference dataset explicitely.

It seems weird since auxValues are not stored in dataset. It just so happens that auxiliary dataset values have the same type as the dataset values.

[axelboc]

Yeah, wasn't sure that it was clearer. Two goals here:

1. The types of value and of each item in auxValues should match (if an NXdata group has a boolean signal, then it should be allowed to have boolean auxiliaries). This requires changing auxValues?: NumArray[] at least to ArrayValue<NumericLikeType> to match the value prop.
2. The dtype passed to Dataset<ArrayShape, DType> should match the dtype passed to ArrayValue<Dtype>. In other words, I'd like to avoid the risk of the two becoming out of sync — e.g. Dataset<ArrayShape, NumericLikeType> and ArrayValue<NumericType>. This is why I refer to the type of the dataset prop with Value<Prop['dataset'].

Perhaps the second goal is not critical, since TypeScript would show an error in the container if the dtype of dataset and value/auxValues did not match. So should I stick with ArrayValue<NumericLikeType>?

[axelboc]

Opening a PR to propose a normalisation of the mapped components' props.