We should rearrange the scenario points

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

Scenarios are listed in order by number of points with those costing the fewest points at the top.

This was always kind of a debatable structure because it puts the hardest scenarios first, which doesn't make a lot of sense, but now that those points do nothing else, we really should change this.

Solution you would like.

We should:

1. make all scenario point costs positive
2. limit scenario points to a max of 4
3. Rank scenarios in the following order: 0 - very simple scenario, easy situation with lots of benefits. As easy or easier than evacuee. 1 - simple scenario, just fine for a second playthrough. 2 - standard scenario, does not impose any significant challenges but probably not a good one to start on. default score for scenarios 3 - challenge scenario, most people will die several times on this the first few plays through 4 - extreme challenge scenario, we don't really expect you to survive this but somehow people manage.

Describe alternatives you have considered.

We could reorder it in any way, and the /5 thing is totally arbitrary but I think having more points just makes it easier to debate whether or not particular scenarios are harder than each other. In fact, limiting it to like 3 levels (beginner, normal, hard) would even be fine.

it may be worth putting a divider between the levels to help beginners pick.

Additional context

No response