With the new version of Visual Studio bringing C# 12, we can revise our logic for better readability as well as use new methods/APIs introduced in the .NET 8.0 BCL.
We implement simple state machine iterators to iterate through every split type encounter array, and more finely control the path we iterate through. And, by using generics, we can have the compiler generate optimized code to avoid virtual calls.
In addition to this, we shift away from the big-5 encounter types and not inherit from an abstract class. This allows for creating a PK* of a specific type and directly writing properties (no virtual calls). Plus we can now fine-tune each encounter type to call specific code, and not have to worry about future game encounter types bothering the generation routines.
Inline logic for Meowstic form branch evo
Pass levelup byte value directly instead of recompute
With EvolutionSet all shared, reorder the constructor so the primary ctor doesn't need manually ordered properties (8 byte total struct size)
Improve cctor times for Breeding; direct calls for splitbreed checks; inlined binary searches via generated IL instead of hashset
Fix permitting alpha ribbon on non-alphas in Gen8/8a/8b, disallow Gen8a/8b ribbons for Gen7 Alolan Raichu
Improve some IL generation of EvoChain logic
Add xmldoc for new evotree additions
Like move validation, evolutions are the earliest thing we wish to traverse when determining what encounters may have originated the current Pokémon. To determine the permitted species-form-levels a Pokémon could originate with, we must devolve a Pokémon by traveling down-generation to origin. Once we have an encounter, we can then evolve it to the current species, traversing upwards from origin to the current format.
