Added options and efficiency

[Zingabopp]

• Reworked the Harmony patch for a bit more efficiency by using Harmony parameters to get the private fields instead of Reflection.
• Added options for slash and explosion particle lifetime.
• Added option for rainbow particles.
• Config gets read from the file OnActiveSceneChanged
• Replaced all Get/Set Fields with a fancy RefGetter, almost as fast as accessing the field directly.
  • All RefGetter delegates are created OnApplicationStart
  • RefGetters for for Camera Noise/World Particles and Slash/Explosion Particles are in their own try/catch blocks so if one of them fails (game update breaks it), the other will still function.

[Shadnix-was-taken]

Fancy! Thanks. Will try to test and push a new release in the next couple of days.