Bump BlockArrays compat to 1

[lassepe]

TODO (from https://github.com/JuliaArrays/BlockArrays.jl?tab=readme-ov-file#changes-in-v10)

• BlockedArray replaces PseudoBlockArray.
• Axes are now typically BlockedOneTo instead of BlockUnitRange.
• Support for some simple block-banded matrices has been moved here from BlockBandedMatrices.jl.
• The definition of blocksizes(array::AbstractArray) is changed from blocklengths.(axes(array)) to an iterator of size
• blocksize(array) over the sizes of each block of array.
• BlockedUnitRange is now parametrized by the element type instead of hardcoded to Int.