Fix runtime Reflection ArgumentExceptions and projectile/menu NullReferenceExceptions

[Spagles]

Replaced invalid null Reflection assignments on Verse.Verb primitive int fields (cachedBurstShotCount and cachedTicksBetweenBurstShots) with -1 to prevent ArgumentException crashes during module/trait updates.
Ensured Projectile.extraDamages is initialized before appending trait extra damages (e.g. EMP rounds) to avoid NullReferenceException when firing standard projectiles
Added null-conditional access to context.FirstSelectedPawn when retrieving reload float menu options to prevent null dereferences when no pawn is selected