Make the table argument in Layers order based rather than keyword only

[deanm0000]

Is your feature request related to a problem? Please describe.
Just a minor annoyance of doing ScatterplotLayer(table=my_table) instead of ScatterplotLayer(my_table)

Describe the solution you'd like
Just move the asterisk in __init__

Describe alternatives you've considered
none

Additional context
no more context

Happy to do a PR for this if it's desired.

[kylebarron]

I think this is worthwhile, especially as I want to have more users using GeoArrow input.