feat: misc

[qudix]

• add GetPrivateProfileInt to REX::W32
• fix singleton and update id's for BSTimer
• add functions to Main
• add ACTOR_VISIBILITY_MASK and IsVisible() to Actor
• overhaul NiPointX and NiMatrixX classes
• add SEX formatter

You'll also notice I added static to all uses of Relocation<T>, this is to avoid unnecessary work like id-to-offset lookups being done every time a function is called, especially in hot paths.