Dice: Backport 0.2.0 face_values format (kinda)

[20kdc]

Changes

• face_values can now have the keys and values swapped, as in 0.2.0. Internal representation is a dictionary of values (as strings) to array of Vector3 normals. Array mustn't be empty. The first vector will be used as the rotation when setting the value.
• Removed restriction on value count matching dice sides. (While the total amount of normals could be checked, IMO this
  restriction is arbitrary.)
• Face values are arbitrary; they are now stringified during load. Numbers are parsed when totalling requires it.
• When only a single dice is selected, the Total indicator instead now says Value, and the value given is "raw" (i.e. for named faces, this shows the face name).

Fixes/Solves
What does this PR fix or solve? If applicable, put the issue number here.

This screenshot is an example use-case: Fudge/FATE dice. These have two blanks (value 0), two + (value 1) symbols and two - (value -1) symbols.
The way you calculate rolls with these is to roll four at once, then total the values. Tabletop Club almost supports this perfectly, but without this PR, their values cannot be properly represented (at least without perhaps tricks like int/float differentiation) and thus it's not possible to get a total.

Numbers (as used)

face_values = {
    Vector2(0.0, 0.0): 1,
    Vector2(180.0, 0.0): 1,
    Vector2(0.0, 90.0): 0,
    Vector2(0.0, -90.0): 0,
    Vector2(-90.0, 0.0): -1,
    Vector2(90.0, 0.0): -1
}

Names (as an example)

face_values = {
    Vector2(0.0, 0.0): "+",
    Vector2(180.0, 0.0): "+",
    Vector2(0.0, 90.0): " ",
    Vector2(0.0, -90.0): " ",
    Vector2(-90.0, 0.0): "-",
    Vector2(90.0, 0.0): "-"
}

This also mostly helps #209 (though it's not possible to specify a numeric value for a named value).

NOTE: Make sure this PR goes to the master branch! If this fix applies to
previously released versions, then the commits will be cherry-picked afterwards.
Done.

[drwhut]

Thank you for the PR! 🥳

My only concern with it's current implementation is that it would not be compatible with the new face-value system in v0.2.0 (which has already been implemented and tested in the 0.2-rewrite branch, see here for how the game reads the config.cfg file on that branch).

For reference, the format for the face_values property in v0.2.0 is essentially reversed from what it is in v0.1.x, in that the keys are the rotation required to make the given face point upwards, and the value is the, well, value:

; An example 'face_values' from v0.2.0:
face_values = {
    Vector2(0.0, 0.0): null,
    Vector2(90.0, 0.0): 2,
    Vector2(0.0, 90.0): 4.5,
    Vector2(180.0, 0.0): "wat",
}

I did it this way for two reasons: 1. it solved the duplicate face-value problem, as only the keys are required to be unique, and 2. I figured it is incredibly unlikely that anyone would want two separate values for one face.

I've also made it so that in v0.2.0, the game will still accept the current format for backwards-compatibility, but it will show a warning saying the new format should be used instead.

So yeah to prevent incompatibilites between versions, either the v0.2.0 system will need to be backported, or the v0.2.0 system will need to be replaced with this PR's system.

[20kdc]

I'll go with backporting the v0.2.0 system, now I know what that looks like

[20kdc]

Hopefully this should be compatible?

[drwhut]

Looks good! I've just got a few points that need addressing, but once they're resolved I'll test the changes on my end and merge if I can't find anything else 👍

[drwhut]

Looks good, thank you! Will test as soon as I can before merging 👍

[20kdc]

Ah, thank you

[drwhut]

No, thank YOU! 😁