Scoring for non-additive models that aren't dominant/recessive

[smlmbrt]

Need to implement a method to calculate PGS that only have the dosage_#_weight-type columns in the schema.

Discussed in #313

^{Originally posted by DarioS June 14, 2024}
PGS Catalog has incorporated non-additive models from PGP000546 two days ago. Can PGSC Calc use such models correctly?

[smlmbrt]

PGScatalog/pygscatalog#44 shows that these types of scores currently cause an error within pygscatalog. Will fix so they don't cause the whole calculator to crash, but it will probably take a lot longer to implement dosage specific scoring.