Language Feature: Static generic class variables

[Frotty]

This PR adds the new language feature "static generic class variables" which allows such a construct for new generics:

class List<T:>
    static T array storage

Which then creates one array-variable per uniquely used type of T and resolves it correctly.

This PR also adds:

• Safety checks against combining new generics with old generics. With the move to new generics come some limitations but also much better performance and safety.
• (WIP) Bundle native, minimal JREs for the compiler so we no longer require the user to install java manually. This can be problematic on Mac though.