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.
Gift1: use IVs if required
Gift2: Enforce 0 TimeOfDay
Egg9: Require Egg Location to match encounter
PGT: keep requested gender in the event of antishiny
PGT: never yield Korean Ranger Manaphy for Format4
Simplify ushort range checks
Rename `EReader` bool to `IsEReader`
Extract Gender/Nature fetch for unfixed encounters
Remove Unown PIDIV branch when template has no Unown
Remove unnecessary loop for Pokewalker PID creation
