Print JVM and Rascal versions and path config consistently and prettily for every terminal.

[jurgenvinju]

Is your feature request related to a problem? Please describe.

It is a user need for debugging configuration and setup to know which java installation, rascal version and compiler/interpreter path is configured. Currently, we print some of this information, but differently for every terminal context.

Describe the solution you'd like

When the terminal starts, always:

• print Java VM version and location
• print Rascal version
• pretty-print the PathConfig, although this can be large.

In an IDE context, it could also be enough to make this information available through UX (popups, hovers, or views) and keep the terminal clean.

The debug prints for the resolution of lib paths and such could go away if this information is printed accurately, which would clean up our terminal logs visually.

[jurgenvinju]

This could also be hidden in :version of :help or :config or something to keep things clean?