Getting started with Julia

Users may not have much Julia experience. It's hard for such users to distinguish Julia usage errors from DeviceLayout usage errors and DeviceLayout bugs. It's also hard for them to read and understand Julia error messages. (For common Julia usage errors, we should treat them as DeviceLayout issues and improve our documentation and error messages.)

JuMP has a ["Getting started with Julia" page](https://jump.dev/JuMP.jl/stable/tutorials/getting_started/getting_started_with_julia/#Getting-started-with-Julia) as part of its documentation. It's pretty good. Maybe we should just link to it? We could also write our own, link to [the Julia manual](https://docs.julialang.org/en/v1/), link to [Modern Julia Workflows](https://modernjuliaworkflows.org/), etc.