[Feature] Remove Pokemon Prefix from Modifier Class Names

[xsn34kzx]

Is your feature request related to a problem? Please describe.

With how verbose modifier-related class names in are already, having Pokemon as a prefix ends up being more or less unnecessary. This may extend to other groups of classes (most directly, the ModifierType classes as well).

Describe the Feature

Removing Pokemon from all class names that don't need it would be enough. Renaming classes for better concise description/context would be the next step, if there are any that may need it.

Additional context

Mentioned initially in #3141 (comment).