Start-UnityEditor doesn't have the option to specify additional arguments

[StephenHodgson]

Start-UnityEditor should let the user specify additional arguments for the unity command line as not every argument is surfaced to the parameter list of the command.

For example:

Start-UnityEditor -BatchMode -AdditionalArgs "-nographics -force-driver-type-warp"

[Ziugy]

Maybe we could achieve these additional arguments with splatting?

[jwittner]

I dig the AdditionalArgs to catch new arguments without needing updates, but also feel we should work to surface all the existing args as well.