Vectors don't seem to support brodcasting

The following example from `ClimaAtmos` returns an error
```julia
a = Geometry.UVector.(integrator.p.ᶜu)
max.(a,a)
```
I am not sure if I am doing something wrong, but the same code works for scalars.

Start by reproducing the ClimaAtmos example with Geometry.UVector and max.(a, a), then inspect the broadcasting behavior for UVector values. Done means the vector expression works consistently with the scalar case without raising the reported error.

Written by the indexing model from the issue text.