Expand lineage tracking functionality

[Nevakanezah]

The current implementation of family tracking is quite simplistic, tracking only father and mother for each horse. Expanding this system's complexity would more faithfully model the kind of elaborate, real-world bloodline tracking performed by animal breeders and royal families alike.

A possible implementation of this feature could involve:

• A linked tree of familial relations for each individual horse
• A GUI means of displaying that family tree in a readable way
• A patrilineal attribute called "bloodline" or "lineage" that can be used to label breeding tracks. Settable on any horse by slapping them with a renamed sign, it passes to their children; the father's label will take precedence if both parents possess one.
• Inbreeding is no longer a raw "is/isnt related" check, and instead uses some sort of unique relatedID system to determine the genetic similarity of two individuals, and perhaps also track a hidden "inbred%" attribute.
  • Similar to UUID, the child ID is generated by merging their relatedIDs + some individual randomness.
  • If the parents meet a threshold of relatedness, the inbred% of the child increases. If the parents had a non-zero inbred%, this also contributes to the final inbred% of the child.
  • Children with a certain threshold of inbreeding begin to exhibit defects
  • Breeding with dissimilar partners reduces inbreeding.