what if... for 2.0.0 we made (almost) everything internal

[TylerLeonhardt]

There's only a handful of things that really should be public and since we haven't published a nuget package in ages, it's not like anyone is depending on us like that at the moment (except maybe @SeeminglyScience 😄)

Who do you think we'd break if we made everything that's public to internal?

We'd keep stuff like $psEditor and such public... but everything else could be made internal. That way 2.0.0 onward we can go from internal to public where it makes sense.