Make more options available in the REPL

[mkubilayk]

Opening this after a short conversation with @lukastaegert.

Feature Use Case

REPL is super useful as a playground and for sharing reproduction steps for bugs but only allows configuring options.format from the big list of options. It would be very convenient to have more options configurable there.

Feature Proposal

I don't have a good interface design to propose but a couple of requirements we should consider:

• Options do not clutter the initial view
• Interface can be extended easily to add new options
• Sharable links should encode selected options