Implement non-function type alias support in Intellij

[leafpetersen]

This issue tracks support of the non-function type alias feature. See the enclosing meta-issue for details.

cc @devoncarew @jwren @mit-mit @franklinyow

@bwilkerson do you want a separate issue to track any other tooling support that you expect to want to do?

[jwren]

This was completed by JetBrains with:

JetBrains/intellij-plugins@1884755

https://youtrack.jetbrains.com/issue/WEB-49464