Apply bias towards middle values to Tycoon Wallet shop prices

[GSKirox]

All shopsanity prices option except 'Random' currently uses a fully uniform distribution between min and max prices.
When using the Tycoon Wallet option, this means half of the prices will be greater than 500, which can be extremely hard and boring to farm rupees for.
Which to be fair, is kinda what you're signing for when using the option, but a bias towards middle values could help this setting being a bit less tedious.

This change applies the same distribution used for the 'Random' option, which is a Beta distribution with alpha = 1.5 and beta = 2.0.

For reference, here is the corresponding chart to this distribution :

[fenhl]

Seems strange to have the 0–300 and 0–995 settings behave one way and the 0–95, 0–200, and 0–500 settings another way. Maybe we should have two separate settings defining the maximum price and the distribution to use?

[GSKirox]

It is pretty unintuitive I agree. Or maybe just apply the same distribution to all shop options, it's not a huge difference anyway.

[cjohnson57]

Imo this is a pretty significant change that will have to be considered carefully

[Cuphat]

Agreed that they should all be consistent, unsure if it is worth a separate setting to control the way the randomness is generated.

[GSKirox]

I'd personally go for #2037 instead of my lazy attempt. It gives much more control to the user.

[cjohnson57]

I think my plan is to have fenhl make #2037 a plando-only feature and use that, so I'll go ahead and close this.